systematic review

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Homotoxicology is sometimes praised as the ‘best kept detox secret‘, often equated with homeopathy, and even more often not understood at all.

But what is it really?

Homotoxicology is the science of toxins and their removal from the human body. It offers a theory of disease which describes the severity and duration of an illness or disorder based on toxin-loading relative to our body’s ability to detoxify. In other words, it tells you how sick you’ll get when what stays inside progressively overwhelms our ability to get the garbage out. It explains what you can expect to see as you start removing toxins.

And yes, there is a hierarchy of toxic substances. Homotoxicology says you should remove the gentler ones first. As the body strengthens, it will be able to handle the really bad stuff (i.e., heavy metals). This explains why some people do really well on the same detox treatments that take others out at the knees.

Yes, I know!

This sounds very much like promotional BS!!!

So, what is it really, and what evidence is there to support it?

Homotoxicolgy is a therapy developed by the German physician and homeopath Hans Reckeweg. It is strongly influenced by (but not identical with) homoeopathy. Proponents of homotoxicology understand it as a modern extension of homoeopathy developed partly in response to the effects of the Industrial Revolution, which imposed chemical pollutants on the human body.

„Ich möchte einmal die Homöopathie mit der Schulmedizin verschmelzen H.-H. Reckeweg Küstermann/Auriculotherapie_2008.

According to the assumptions of homotoxicology, any human disease is the result of toxins, which originate either from within the body or from its environment. Allegedly, each disease process runs through six specific phases and is the expression of the body’s attempt to cope with these toxins. Diseases are thus viewed  as biologically useful defence mechanisms. Health, on the other hand, is the expression of the absence of toxins in our body. It seems obvious that these assumptions are not based on science and bear no relationship to accepted principles of toxicology or therapeutics. In other words, homotoxicology is not plausible.
The therapeutic strategies of homotoxicology are essentially threefold:

• prevention of further homotoxicological challenges,
• elimination of homotoxins,
• treatment of existing ‘homotoxicoses’.

Frequently used homotoxicological remedies are fixed combinations of homeopathically prepared remedies such as nosodes, suis-organ preparations and conventional drugs. All these remedies are diluted and potentised according to the rules of homoeopathy. Proponents of homotoxicology claim that they activate what Reckeweg called the ‘greater defence system’— a concerted neurological, endocrine, immunological, metabolic and connective tissue response that can give rise to symptoms and thus excretes homotoxins. Homotoxicological remedies are produced by Heel, Germany and are sold in over 60 countries. The crucial difference between homotoxicology and homoeopathy is that the latter follows the ‘like cures like’ principle, while the former does not. As this is the defining principle of homeopathy, it would be clearly wrong to assume that homotoxicology is a form of homeopathy.

Several clinical trials of homotoxicology are available. They are usually sponsored or conducted by the manufacturer. Independent research is very rare. In most major reviews, these studies are reviewed together with trials of homeopathic remedies which is obviously not correct. Our systematic review purely of studies of homotoxicology included 7 studies, all of which had major flaws. We concluded that the placebo-controlled, randomised clinical trials of homotoxicology fail to demonstrate the efficacy of this therapeutic approach.

So, I ask again: what is homotoxicology?

It is little more than homeopathic nonsense + detox nonsense + some more nonsense.

My advice is to say well clear of it.

Often referred to as “Psychological acupressure”, the emotional freedom technique (EFT) works by releasing blockages within the energy system which are the source of emotional intensity and discomfort. These blockages in our energy system, in addition to challenging us emotionally, often lead to limiting beliefs and behaviours and an inability to live life harmoniously. Resulting symptoms are either emotional and/ or physical and include lack of confidence and self esteem, feeling stuck anxious or depressed, or the emergence of compulsive and addictive behaviours. It is also now finally widely accepted that emotional disharmony is a key factor in physical symptoms and dis-ease and for this reason these techniques are being extensively used on physical issues, including chronic illness with often astounding results. As such these techniques are being accepted more and more in medical and psychiatric circles as well as in the range of psychotherapies and healing disciplines.

An EFT treatment involves the use of fingertips rather than needles to tap on the end points of energy meridians that are situated just beneath the surface of the skin. The treatment is non-invasive and works on the ethos of making change as simple and as pain free as possible.

EFT is a common sense approach that draws its power from Eastern discoveries that have been around for over 5,000 years. In fact Albert Einstein also told us back in the 1920’s that everything (including our bodies) is composed of energy. These ideas have been largely ignored by Western Healing Practices and as they are unveiled in our current times, human process is reopening itself to the forgotten truth that everything is Energy and the potential that this offers us.


If you ask me, this sounds as though EFT combines pseudo-psychological with acupuncture-BS.

But I may be wrong.

What does the evidence tell us?

A systematic review included 14 RCTs of EFT with a total of 658 patients.  The pre-post effect size for the EFT treatment group was 1.23 (95% confidence interval, 0.82-1.64; p < 0.001), whereas the effect size for combined controls was 0.41 (95% confidence interval, 0.17-0.67; p = 0.001). Emotional freedom technique treatment demonstrated a significant decrease in anxiety scores, even when accounting for the effect size of control treatment. However, there were too few data available comparing EFT to standard-of-care treatments such as cognitive behavioural therapy, and further research is needed to establish the relative efficacy of EFT to established protocols.  Meta-analyses indicate large effect sizes for posttraumatic stress disorder, depression, and anxiety; however, treatment effects may be due to components EFT shares with other therapies.

Another, more recent analysis reviewed whether EFTs acupressure component was an active ingredient. Six studies of adults with diagnosed or self-identified psychological or physical symptoms were compared (n = 403), and three (n = 102) were identified. Pretest vs. posttest EFT treatment showed a large effect size, Cohen’s d = 1.28 (95% confidence interval [CI], 0.56 to 2.00) and Hedges’ g = 1.25 (95% CI, 0.54 to 1.96). Acupressure groups demonstrated moderately stronger outcomes than controls, with weighted posttreatment effect sizes of d = -0.47 (95% CI, -0.94 to 0.0) and g = -0.45 (95% CI, -0.91 to 0.0). Meta-analysis indicated that the acupressure component was an active ingredient and outcomes were not due solely to placebo, nonspecific effects of any therapy, or non-acupressure components.

From these and other reviews, one could easily get the impression that my above-mentioned suspicion is erroneous and EFT is an effective therapy. But I still do have my doubts.


These reviews conveniently forget to mention that the primary studies tend to be of poor or even very poor quality. The most common flaws include tiny sample sizes, wrong statistical approach, lack of blinding, lack of control of placebo and other nonspecific effects. Reviews of such studies thus turn out to be a confirmation of the ‘rubbish in, rubbish out’ principle: any summary of flawed studies are likely to produce a flawed result.

Until I have good quality trials to convince me otherwise, EFT is in my view:

  1. implausible and
  2. not of proven effectiveness for any condition.

Fish oil (omega-3 PUFA) preparations are today extremely popular and amongst the best-researched dietary supplement. During the 1970s, two Danish scientists, Bang and Dyerberg, remarked that Greenland Eskimos had a baffling lower prevalence of coronary artery disease than mainland Danes. They also noted that their diet contained large amounts of seal and whale blubber and suggested that this ‘Eskimo-diet’ was a key factor in the lower prevalence. Subsequently, a flurry of research stared to investigate the phenomenon, and it was shown that the ‘Eskimo-diet’ contained unusually high concentrations of omega-3 polyunsaturated fatty acids from fish oils (seals and whales feed predominantly on fish).

Initial research also demonstrated that the regular consumption of fish oil has a multitude of cardiovascular and anti-inflammatory effects. This led to the promotion of fish oil supplements for a wide range of conditions. Meanwhile, many of these encouraging findings have been overturned by more rigorous studies, and the enthusiasm for fish oil supplements has somewhat waned. But now, a new paper has come out with surprising findings.

The objective of this meta-analysis was to evaluate the association of anxiety symptoms with omega-3 PUFA treatment compared with controls in varied populations.

A search was performed of clinical trials assessing the anxiolytic effect of omega-3 PUFAs in humans, in either placebo-controlled or non–placebo-controlled designs. Of 104 selected articles, 19 entered the final data extraction stage. Two authors independently extracted the data according to a predetermined list of interests. A random-effects model meta-analysis was performed. Changes in the severity of anxiety symptoms after omega-3 PUFA treatment served as the main endpoint.

In total, 1203 participants with omega-3 PUFA treatment and 1037 participants without omega-3 PUFA treatment showed an association between clinical anxiety symptoms among participants with omega-3 PUFA treatment compared with control arms. Subgroup analysis showed that the association of treatment with reduced anxiety symptoms was significantly greater in subgroups with specific clinical diagnoses than in subgroups without clinical conditions. The anxiolytic effect of omega-3 PUFAs was significantly better than that of controls only in subgroups with a higher dosage (at least 2000 mg/d) and not in subgroups with a lower dosage (<2000 mg/d).

The authors concluded that this review indicates that omega-3 PUFAs might help to reduce the symptoms of clinical anxiety. Further well-designed studies are needed in populations in whom anxiety is the main symptom.

I think this is a fine meta-analysis reporting clear results. I doubt that this paper truly falls under the umbrella of alternative medicine, but fish oil is a popular food supplement and should be mentioned on this blog. Of course, the average effect size is modest, but the findings are nevertheless intriguing.

I remember reading this paper entitled ‘Comparison of acupuncture and other drugs for chronic constipation: A network meta-analysis’ when it first came out. I considered discussing it on my blog, but then decided against it for a range of reasons which I shall explain below. The abstract of the original meta-analysis is copied below:

The objective of this study was to compare the efficacy and side effects of acupuncture, sham acupuncture and drugs in the treatment of chronic constipation. Randomized controlled trials (RCTs) assessing the effects of acupuncture and drugs for chronic constipation were comprehensively retrieved from electronic databases (such as PubMed, Cochrane Library, Embase, CNKI, Wanfang Database, VIP Database and CBM) up to December 2017. Additional references were obtained from review articles. With quality evaluations and data extraction, a network meta-analysis (NMA) was performed using a random-effects model under a frequentist framework. A total of 40 studies (n = 11032) were included: 39 were high-quality studies and 1 was a low-quality study. NMA showed that (1) acupuncture improved the symptoms of chronic constipation more effectively than drugs; (2) the ranking of treatments in terms of efficacy in diarrhoea-predominant irritable bowel syndrome was acupuncture, polyethylene glycol, lactulose, linaclotide, lubiprostone, bisacodyl, prucalopride, sham acupuncture, tegaserod, and placebo; (3) the ranking of side effects were as follows: lactulose, lubiprostone, bisacodyl, polyethylene glycol, prucalopride, linaclotide, placebo and tegaserod; and (4) the most commonly used acupuncture point for chronic constipation was ST25. Acupuncture is more effective than drugs in improving chronic constipation and has the least side effects. In the future, large-scale randomized controlled trials are needed to prove this. Sham acupuncture may have curative effects that are greater than the placebo effect. In the future, it is necessary to perform high-quality studies to support this finding. Polyethylene glycol also has acceptable curative effects with fewer side effects than other drugs.


This meta-analysis has now been retracted. Here is what the journal editors have to say about the retraction:

After publication of this article [1], concerns were raised about the scientific validity of the meta-analysis and whether it provided a rigorous and accurate assessment of published clinical studies on the efficacy of acupuncture or drug-based interventions for improving chronic constipation. The PLOS ONE Editors re-assessed the article in collaboration with a member of our Editorial Board and noted several concerns including the following:

  • Acupuncture and related terms are not mentioned in the literature search terms, there are no listed inclusion or exclusion criteria related to acupuncture, and the outcome measures were not clearly defined in terms of reproducible clinical measures.
  • The study included acupuncture and electroacupuncture studies, though this was not clearly discussed or reported in the Title, Methods, or Results.
  • In the “Routine paired meta-analysis” section, both acupuncture and sham acupuncture groups were reported as showing improvement in symptoms compared with placebo. This finding and its implications for the conclusions of the article were not discussed clearly.
  • Several included studies did not meet the reported inclusion criteria requiring that studies use adult participants and assess treatments of >2 weeks in duration.
  • Data extraction errors were identified by comparing the dataset used in the meta-analysis (S1 Table) with details reported in the original research articles. Errors included aspects of the study design such as the experimental groups included in the study, the number of study arms in the trial, number of participants, and treatment duration. There are also several errors in the Reference list.
  • With regard to side effects, 22 out of 40 studies were noted as having reported side effects. It was not made clear whether side effects were assessed as outcome measures for the other 18 studies, i.e. did the authors collect data clarifying that there were no side effects or was this outcome measure not assessed or reported in the original article. Without this clarification the conclusion comparing side effect frequencies is not well supported.
  • The network geometry presented in Fig 5 is not correct and misrepresents some of the study designs, for example showing two-arm studies as three-arm studies.
  • The overall results of the meta-analysis are strongly reliant on the evidence comparing acupuncture versus lactulose treatment. Several of the trials that assessed this comparison were poorly reported, and the meta-analysis dataset pertaining to these trials contained data extraction errors. Furthermore, potential bias in studies assessing lactulose efficacy in acupuncture trials versus lactulose efficacy in other trials was not sufficiently addressed.

While some of the above issues could be addressed with additional clarifications and corrections to the text, the concerns about study inclusion, the accuracy with which the primary studies’ research designs and data were represented in the meta-analysis, and the reporting quality of included studies directly impact the validity and accuracy of the dataset underlying the meta-analysis. As a consequence, we consider that the overall conclusions of the study are not reliable. In light of these issues, the PLOS ONE Editors retract the article. We apologize that these issues were not adequately addressed during pre-publication peer review.

LZ disagreed with the retraction. YM and XD did not respond.


Let me start by explaining why I initially decided not to discuss this paper on my blog. Already the first sentence of the abstract put me off, and an entire chorus of alarm-bells started ringing once I read further.

  • A meta-analysis is not a ‘study’ in my book, and I am somewhat weary of researchers who employ odd or unprecise language.
  • We all know (and I have discussed it repeatedly) that studies of acupuncture frequently fail to report adverse effects (in doing this, their authors violate research ethics!). So, how can it be a credible aim of a meta-analysis to compare side-effects in the absence of adequate reporting?
  • The methodology of a network meta-analysis is complex and I know not a lot about it.
  • Several things seemed ‘too good to be true’, for instance, the funnel-plot and the overall finding that acupuncture is the best of all therapeutic options.
  • Looking at the references, I quickly confirmed my suspicion that most of the primary studies were in Chinese.

In retrospect, I am glad I did not tackle the task of criticising this paper; I would probably have made not nearly such a good job of it as PLOS ONE eventually did. But it was only after someone raised concerns that the paper was re-reviewed and all the defects outlined above came to light.

While some of my concerns listed above may have been trivial, my last point is the one that troubles me a lot. As it also related to dozens of Cochrane reviews which currently come out of China, it is worth our attention, I think. The problem, as I see it, is as follows:

  • Chinese (acupuncture, TCM and perhaps also other) trials are almost invariably reporting positive findings, as we have discussed ad nauseam on this blog.
  • Data fabrication seems to be rife in China.
  • This means that there is good reason to be suspicious of such trials.
  • Many of the reviews that currently flood the literature are based predominantly on primary studies published in Chinese.
  • Unless one is able to read Chinese, there is no way of evaluating these papers.
  • Therefore reviewers of journal submissions tend to rely on what the Chinese review authors write about the primary studies.
  • As data fabrication seems to be rife in China, this trust might often not be justified.
  • At the same time, Chinese researchers are VERY keen to publish in top Western journals (this is considered a great boost to their career).
  • The consequence of all this is that reviews of this nature might be misleading, even if they are published in top journals.

I have been struggling with this problem for many years and have tried my best to alert people to it. However, it does not seem that my efforts had even the slightest success. The stream of such reviews has only increased and is now a true worry (at least for me). My suspicion – and I stress that it is merely that – is that, if one would rigorously re-evaluate these reviews, their majority would need to be retracted just as the above paper. That would mean that hundreds of papers would disappear because they are misleading, a thought that should give everyone interested in reliable evidence sleepless nights!

So, what can be done?

Personally, I now distrust all of these papers, but I admit, that is not a good, constructive solution. It would be better if Journal editors (including, of course, those at the Cochrane Collaboration) would allocate such submissions to reviewers who:

  • are demonstrably able to conduct a CRITICAL analysis of the paper in question,
  • can read Chinese,
  • have no conflicts of interest.

In the case of an acupuncture review, this would narrow it down to perhaps just a handful of experts worldwide. This probably means that my suggestion is simply not feasible.

But what other choice do we have?

One could oblige the authors of all submissions to include full and authorised English translations of non-English articles. I think this might work, but it is, of course, tedious and expensive. In view of the size of the problem (I estimate that there must be around 1 000 reviews out there to which the problem applies), I do not see a better solution.

(I would truly be thankful, if someone had a better one and would tell us)

Psoriasis is one of those conditions that is

  • chronic,
  • not curable,
  • irritating to the point where it reduces quality of life.

In other words, it is a disease for which virtually all alternative treatments on the planet are claimed to be effective. But which therapies do demonstrably alleviate the symptoms?

This review (published in JAMA Dermatology) compiled the evidence on the efficacy of the most studied complementary and alternative medicine (CAM) modalities for treatment of patients with plaque psoriasis and discusses those therapies with the most robust available evidence.

PubMed, Embase, and searches (1950-2017) were used to identify all documented CAM psoriasis interventions in the literature. The criteria were further refined to focus on those treatments identified in the first step that had the highest level of evidence for plaque psoriasis with more than one randomized clinical trial (RCT) supporting their use. This excluded therapies lacking RCT data or showing consistent inefficacy.

A total of 457 articles were found, of which 107 articles were retrieved for closer examination. Of those articles, 54 were excluded because the CAM therapy did not have more than 1 RCT on the subject or showed consistent lack of efficacy. An additional 7 articles were found using references of the included studies, resulting in a total of 44 RCTs (17 double-blind, 13 single-blind, and 14 nonblind), 10 uncontrolled trials, 2 open-label nonrandomized controlled trials, 1 prospective controlled trial, and 3 meta-analyses.

Compared with placebo, application of topical indigo naturalis, studied in 5 RCTs with 215 participants, showed significant improvements in the treatment of psoriasis. Treatment with curcumin, examined in 3 RCTs (with a total of 118 participants), 1 nonrandomized controlled study, and 1 uncontrolled study, conferred statistically and clinically significant improvements in psoriasis plaques. Fish oil treatment was evaluated in 20 studies (12 RCTs, 1 open-label nonrandomized controlled trial, and 7 uncontrolled studies); most of the RCTs showed no significant improvement in psoriasis, whereas most of the uncontrolled studies showed benefit when fish oil was used daily. Meditation and guided imagery therapies were studied in 3 single-blind RCTs (with a total of 112 patients) and showed modest efficacy in treatment of psoriasis. One meta-analysis of 13 RCTs examined the association of acupuncture with improvement in psoriasis and showed significant improvement with acupuncture compared with placebo.

The authors concluded that CAM therapies with the most robust evidence of efficacy for treatment of psoriasis are indigo naturalis, curcumin, dietary modification, fish oil, meditation, and acupuncture. This review will aid practitioners in advising patients seeking unconventional approaches for treatment of psoriasis.

I am sorry to say so, but this review smells fishy! And not just because of the fish oil. But the fish oil data are a good case in point: the authors found 12 RCTs of fish oil. These details are provided by the review authors in relation to oral fish oil trials: Two double-blind RCTs (one of which evaluated EPA, 1.8g, and DHA, 1.2g, consumed daily for 12 weeks, and the other evaluated EPA, 3.6g, and DHA, 2.4g, consumed daily for 15 weeks) found evidence supporting the use of oral fish oil. One open-label RCT and 1 open-label non-randomized controlled trial also showed statistically significant benefit. Seven other RCTs found lack of efficacy for daily EPA (216mgto5.4g)or DHA (132mgto3.6g) treatment. The remainder of the data supporting efficacy of oral fish oil treatment were based on uncontrolled trials, of which 6 of the 7 studies found significant benefit of oral fish oil. This seems to support their conclusion. However, the authors also state that fish oil was not shown to be effective at several examined doses and duration. Confused? Yes, me too!

Even more confusing is their failure to mention a single trial of Mahonia aquifolium. A 2013 meta-analysis published in the British Journal of Dermatology included 5 RCTs of Mahonia aquifolium which, according to these authors, provided ‘limited support’ for its effectivenessHow could they miss that?

More importantly, how could the reviewers miss to conduct a proper evaluation of the quality of the studies they included in their review (even in their abstract, they twice speak of ‘robust evidence’ – but how can they without assessing its robustness? [quantity is not remotely the same as quality!!!]). Without a transparent evaluation of the rigour of the primary studies, any review is nearly worthless.

Take the 12 acupuncture trials, for instance, which the review authors included based not on an assessment of the studies but on a dodgy review published in a dodgy journal. Had they critically assessed the quality of the primary studies, they could have not stated that CAM therapies with the most robust evidence of efficacy for treatment of psoriasis …[include]… acupuncture. Instead they would have had to admit that these studies are too dubious for any firm conclusion. Had they even bothered to read them, they would have found that many are in Chinese (which would have meant they had to be excluded in their review [as many pseudo-systematic reviewers, the authors only considered English papers]).

There might be a lesson in all this – well, actually I can think of at least two:

  1. Systematic reviews might well be the ‘Rolls Royce’ of clinical evidence. But even a Rolls Royce needs to be assembled correctly, otherwise it is just a heap of useless material.
  2. Even top journals do occasionally publish poor-quality and thus misleading reviews.

The aim of palliative care is to improve quality of life for patients with serious illnesses by treating their symptoms, often in situations where all the possible causative therapeutic options have been exhausted. In many palliative care settings, complementary and alternative medicine (CAM) is used for this purpose. In fact, this is putting it mildly; my impression is that CAM seems to have flooded palliative care. The question is therefore whether this approach is based on sufficiently good evidence.

This review was aimed at evaluating the available evidence on the use of CAM in hospice and palliative care and to summarize their potential benefits. The researchers conducted thorough literature searches and located 4682 studies of which 17 were identified for further evaluation. The therapies considered included:

  • acupressure,
  • acupuncture,
  • aromatherapy massage,
  • breathing,
  • hypnotherapy,
  • massage,
  • meditation,
  • music therapy,
  • reflexology,
  • reiki.

Many studies demonstrated a short-term benefit in symptom improvement from baseline with CAM, although a significant benefit was not found between groups.

The authors concluded that CAM may provide a limited short-term benefit in patients with symptom burden. Additional studies are needed to clarify the potential value of CAM in the hospice or palliative setting.

When reading research articles in CAM, I often have to ask myself: ARE THEY TAKING THE MIKEY?

??? “Many studies demonstrated a short-term benefit in symptom improvement from baseline with CAM, although a significant benefit was not found between groups.” ???


Controlled clinical trials are only about comparing the outcomes between the experimental and the control groups (and not about assessing improvements from baseline which can be [and often is] unrelated to any effect caused by the treatment per se). Therefore, within-group changes are irrelevant and should not even deserve a mention in the abstract. Thus the only finding worth reporting in the abstract is this:

No significant benefit was found.

It follows that the above conclusions are totally out of line with the data.

They should, according to what the researchers report in their abstract, read something like this:


I have often cautioned my readers about the ‘evidence’ supporting acupuncture (and other alternative therapies). Rightly so, I think. Here is yet another warning.

This systematic review assessed the clinical effectiveness of acupuncture in the treatment of postpartum depression (PPD). Nine trials involving 653 women were selected. A meta-analysis demonstrated that the acupuncture group had a significantly greater overall effective rate compared with the control group. Moreover, acupuncture significantly increased oestradiol levels compared with the control group. Regarding the HAMD and EPDS scores, no difference was found between the two groups. The Chinese authors concluded that acupuncture appears to be effective for postpartum depression with respect to certain outcomes. However, the evidence thus far is inconclusive. Further high-quality RCTs following standardised guidelines with a low risk of bias are needed to confirm the effectiveness of acupuncture for postpartum depression.

What a conclusion!

What a review!

What a journal!

What evidence!

Let’s start with the conclusion: if the authors feel that the evidence is ‘inconclusive’, why do they state that ‘acupuncture appears to be effective for postpartum depression‘. To me this does simply not make sense!

Such oddities are abundant in the review. The abstract does not mention the fact that all trials were from China (published in Chinese which means that people who cannot read Chinese are unable to check any of the reported findings), and their majority was of very poor quality – two good reasons to discard the lot without further ado and conclude that there is no reliable evidence at all.

The authors also tell us very little about the treatments used in the control groups. In the paper, they state that “the control group needed to have received a placebo or any type of herb, drug and psychological intervention”. But was acupuncture better than all or any of these treatments? I could not find sufficient data in the paper to answer this question.

Moreover, only three trials seem to have bothered to mention adverse effects. Thus the majority of the studies were in breach of research ethics. No mention is made of this in the discussion.

In the paper, the authors re-state that “this meta-analysis showed that the acupuncture group had a significantly greater overall effective rate compared with the control group. Moreover, acupuncture significantly increased oestradiol levels compared with the control group.” This is, I think, highly misleading (see above).

Finally, let’s have a quick look at the journal ‘Acupuncture in Medicine’ (AiM). Even though it is published by the BMJ group (the reason for this phenomenon can be found here: “AiM is owned by the British Medical Acupuncture Society and published by BMJ”; this means that all BMAS-members automatically receive the journal which thus is a resounding commercial success), it is little more than a cult-newsletter. The editorial board is full of acupuncture enthusiasts, and the journal hardly ever publishes anything that is remotely critical of the wonderous myths of acupuncture.

My conclusion considering all this is as follows: we ought to be very careful before accepting any ‘evidence’ that is currently being published about the benefits of acupuncture, even if it superficially looks ok. More often than not, it turns out to be profoundly misleading, utterly useless and potentially harmful pseudo-evidence.


Acupunct Med. 2018 Jun 15. pii: acupmed-2017-011530. doi: 10.1136/acupmed-2017-011530. [Epub ahead of print]

Effectiveness of acupuncture in postpartum depression: a systematic review and meta-analysis.

Li S, Zhong W, Peng W, Jiang G.

Most people probably think of acupuncture as being used mainly as a therapy for pain control. But acupuncture is currently being promoted (and has traditionally been used) for all sorts of conditions. One of them is stroke. It is said to speed up recovery and even improve survival rates after such an event. There are plenty of studies on this subject, but their results are far from uniform. What is needed in this situation, is a rigorous summary of the evidence.

The authors of this Cochrane review wanted to assess whether acupuncture could reduce the proportion of people suffering death or dependency after acute ischaemic or haemorrhagic stroke. They included all randomized clinical trials (RCTs) of acupuncture started within 30 days after stroke onset. Acupuncture had to be compared with placebo or sham acupuncture or open control (no placebo) in people with acute ischaemic or haemorrhagic stroke, or both. Comparisons were made versus (1) all controls (open control or sham acupuncture), and (2) sham acupuncture controls.

The investigators included 33 RCTs with 3946 participants. Outcome data were available for up to 22 trials (2865 participants) that compared acupuncture with any control (open control or sham acupuncture) but for only 6 trials (668 participants) comparing acupuncture with sham acupuncture.

When compared with any control (11 trials with 1582 participants), findings of lower odds of death or dependency at the end of follow-up and over the long term (≥ three months) in the acupuncture group were uncertain and were not confirmed by trials comparing acupuncture with sham acupuncture. In trials comparing acupuncture with any control, findings that acupuncture was associated with increases in the global neurological deficit score and in the motor function score were uncertain. These findings were not confirmed in trials comparing acupuncture with sham acupuncture.Trials comparing acupuncture with any control showed little or no difference in death or institutional care or death at the end of follow-up.The incidence of adverse events (eg, pain, dizziness, faint) in the acupuncture arms of open and sham control trials was 6.2% (64/1037 participants), and 1.4% of these patients (14/1037 participants) discontinued acupuncture. When acupuncture was compared with sham acupuncture, findings for adverse events were uncertain.

The authors concluded that this updated review indicates that apparently improved outcomes with acupuncture in acute stroke are confounded by the risk of bias related to use of open controls. Adverse events related to acupuncture were reported to be minor and usually did not result in stopping treatment. Future studies are needed to confirm or refute any effects of acupuncture in acute stroke. Trials should clearly report the method of randomization, concealment of allocation, and whether blinding of participants, personnel, and outcome assessors was achieved, while paying close attention to the effects of acupuncture on long-term functional outcomes.

This Cochrane review seems to be thorough, but it is badly written (Cochrane reviewers: please don’t let this become the norm!). It contains some interesting facts. The majority of the studies came from China. This review confirmed the often very poor methodological quality of acupuncture trials which I have frequently mentioned before.

In particular, the RCTs originating from China were amongst those that most overtly lacked rigor, also a fact that has been discussed regularly on this blog.

For me, by far the most important finding of this review is that studies which at least partly control for placebo effects fail to show positive results. Depending on where you stand in the never-ending debate about acupuncture, this could lead to two dramatically different conclusions:

  1. If you are a believer in or earn your living from acupuncture, you might say that these results suggest that the trials were in some way insufficient and therefore they produced false-negative results.
  2. If you are a more reasonable observer, you might feel that these results show that acupuncture (for acute stroke) is a placebo therapy.

Regardless to which camp you belong, one thing seems to be certain: acupuncture for stroke (and other indications) is not supported by sound evidence. And that means, I think, that it is not responsible to use it in routine care.

An article entitled “Homeopathy in the Age of Antimicrobial Resistance: Is It a Viable Treatment for Upper Respiratory Tract Infections?” cannot possibly be ignored on this blog, particularly if published in the amazing journal ‘Homeopathy‘. The title does not bode well, in my view – but let’s see. Below, I copy the abstract of the paper without any changes; all I have done is include a few numbers in brackets; they refer to my comments that follow.


Acute upper respiratory tract infections (URTIs) and their complications are the most frequent cause of antibiotic prescribing in primary care. With multi-resistant organisms proliferating, appropriate alternative treatments to these conditions are urgently required. Homeopathy presents one solution (1); however, there are many methods of homeopathic prescribing. This review of the literature considers firstly whether homeopathy offers a viable alternative therapeutic solution for acute URTIs (2) and their complications, and secondly how such homeopathic intervention might take place.


Critical review of post 1994 (3) clinical studies featuring homeopathic treatment of acute URTIs and their complications. Study design, treatment intervention, cohort group, measurement and outcome were considered. Discussion focused on the extent to which homeopathy is used to treat URTIs, rate of improvement and tolerability of the treatment, complications of URTIs, prophylactic and long-term effects, and the use of combination versus single homeopathic remedies.


Multiple peer-reviewed (4) studies were found in which homeopathy had been used to treat URTIs and associated symptoms (cough, pharyngitis, tonsillitis, otitis media, acute sinusitis, etc.). Nine randomised controlled trials (RCTs) and 8 observational/cohort studies were analysed, 7 of which were paediatric studies. Seven RCTs used combination remedies with multiple constituents. Results for homeopathy treatment were positive overall (5), with faster resolution, reduced use of antibiotics and possible prophylactic and longer-term benefits.


Variations in size, location, cohort and outcome measures make comparisons and generalisations concerning homeopathic clinical trials for URTIs problematic (6). Nevertheless, study findings suggest at least equivalence between homeopathy and conventional treatment for uncomplicated URTI cases (7), with fewer adverse events and potentially broader therapeutic outcomes. The use of non-individualised homeopathic compounds tailored for the paediatric population merits further investigation, including through cohort studies (8). In the light of antimicrobial resistance, homeopathy offers alternative strategies for minor infections and possible prevention of recurring URTIs (9).


And here are my comments:

  1. This sounds as though the author already knew the conclusion of her review before she even started.
  2. Did she not just state that homeopathy is a solution?
  3. This is most unusual; why were pre-1994 articles not considered?
  4. This too is unusual; that a study is peer-reviewed is not really possible to affirm, one must take the journal’s word for it. Yet we know that peer-review is farcical in the realm of alternative medicine (see also below). Therefore, this is an odd inclusion criterion to mention in an abstract.
  5. An overall positive result obtained by including uncontrolled observational and cohort studies lacking a control group is meaningless. There is also no assessment of the quality of the RCTs; after a quick glance, I get the impression that the methodologically sound studies do not show homeopathy to be superior to placebo.
  6. Reviewers need to disentangle these complicating factors and arrive at a conclusion. This is almost invariably problematic, but it is the reviewer’s job.
  7. What might be the conventional treatment of uncomplicated URTI?
  8. Why on earth cohort studies? They tell us nothing about equivalence, efficacy etc.
  9. To reach that conclusion seems to have been the aim of this review (see my point number 1). If I am not mistaken, antibiotics are not indicated in the vast majority of cases of uncomplicated URTI. This means that the true alternative in the light of antimicrobial resistance is to not prescribe antibiotics and treat the patient symptomatically. No need at all for homeopathic placebos, and no need for wishful thinking reviews!

In the paper, the author explains her liking of uncontrolled studies: Non-RCTs and patient reported surveys are considered by some to be inferior forms of research evidence, but are important adjuncts to RCTs that can measure key markers such as patient satisfaction, quality of life and functional health. Observational studies such as clinical outcome studies and case reports, monitoring the effects of homeopathy in real-life clinical settings, are a helpful adjunct to RCTs and more closely reflect real-life experiences of patients and physicians than RCTs, and are therefore considered in this study. I would counter that this is not an issue of inferiority but one that depends on the research question; if the research question relates to efficacy/effectiveness, uncontrolled data are next to useless.

She also makes fairly categorical statements in the conclusion section of the paper about the effectiveness of homeopathy: [the] combined evidence from these and other studies suggests that homeopathic treatment can exert biological effects with fewer adverse events and broader therapeutic opportunities than conventional medicine in the treatment of URTIs. Given the cost implications of treating URTIs and their complications in children, and the relative absence of effective alternatives without potential side effects, the use of non-individualised homeopathic compounds tailored for the paediatric population merits further investigation, including through large-scale cohort studies…  the most important evidence still arises from practical clinical experience and from the successful treatment of millions of patients. I would counter that none of these conclusions are warranted by the data presented.

From reading the paper, I get the impression that the author (the paper provides no information about her conflicts of interest, nor funding source) is a novice to conducting reviews (even though the author is a senior lecturer, the paper reads more like a poorly organised essay than a scientific review). I am therefore hesitant to criticise her – but I do nevertheless find the fact deplorable that her article passed the peer-review process of ‘Homeopathy‘ and was published in a seemingly respectable journal. If anything, articles of this nature are counter-productive for everyone concerned; they certainly do not further effective patient care, and they give homeopathy-research a worse name than it already has.

The only time we discussed gua sha, it led to one of the most prolonged discussions we ever had on this blog (536 comments so far). It seems to be a topic that excites many. But what precisely is it?

Gua sha, sometimes referred to as “scraping”, “spooning” or “coining”, is a traditional Chinese treatment that has spread to several other Asian countries. It has long been popular in Vietnam and is now also becoming well-known in the West. The treatment consists of scraping the skin with a smooth edge placed against the pre-oiled skin surface, pressed down firmly, and then moved downwards along muscles or meridians. According to its proponents, gua sha stimulates the flow of the vital energy ‘chi’ and releases unhealthy bodily matter from blood stasis within sore, tired, stiff or injured muscle areas.

The technique is practised by TCM practitioners, acupuncturists, massage therapists, physical therapists, physicians and nurses. Practitioners claim that it stimulates blood flow to the treated areas, thus promoting cell metabolism, regeneration and healing. They also assume that it has anti-inflammatory effects and stimulates the immune system.

These effects are said to last for days or weeks after a single treatment. The treatment causes microvascular injuries which are visible as subcutaneous bleeding and redness. Gua sha practitioners make far-reaching therapeutic claims, including that the therapy alleviates pain, prevents infections, treats asthma, detoxifies the body, cures liver problems, reduces stress, and contributes to overall health.

Gua sha is mildly painful, almost invariably leads to unsightly blemishes on the skin which occasionally can become infected and might even be mistaken for physical abuse.

There is little research of gua sha, and the few trials that exist tend to be published in Chinese. But recently, a new paper has emerged that is written in English. The goal of this systematic review was to evaluate the available evidence from randomized controlled trials (RCTs) of gua sha for the treatment of patients with perimenopausal syndrome.

A total of 6 RCTs met the inclusion criteria. Most were of low methodological quality. When compared with Western medicine therapy alone, meta-analysis of 5 RCTs indicated favorable statistically significant effects of gua sha plus Western medicine. Moreover, study participants who received Gua Sha therapy plus Western medicine therapy showed significantly greater improvements in serum levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH) compared to participants in the Western medicine therapy group.

The authors concluded that preliminary evidence supported the hypothesis that Gua Sha therapy effectively improved the treatment efficacy in patients with perimenopausal syndrome. Additional studies will be required to elucidate optimal frequency and dosage of Gua Sha.

This sounds as though gua sha is a reasonable therapy.

Yet, I think this notion is worth being critically analysed. Here are some caveats that spring into my mind:

  • Gua sha lacks biological plausibility.
  • The reviewed trials are too flawed to allow any firm conclusions.
  • As most are published in Chinese, non-Chinese speakers have no possibility to evaluate them.
  • The studies originate from China where close to 100% of TCM trials report positive results.
  • In my view, this means they are less than trustworthy.
  • The authors of the above-cited review are all from China and might not be willing, able or allowed to publish a critical paper on this subject.
  • The review was published in , a journal not known for its high scientific standards or critical stance towards TCM.

So, is gua sha a reasonable therapy?

I let you make this judgement.

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