causation
I was alerted to a new book entitled “Handbook of Space Pharmaceuticals“. It contains a chapter on “Homeopathy as a Therapeutic Option in Space” (yes, I am not kidding!). Here is its abstract (the numbers were inserted by me and refer to the short comments below):
Homeopathy is one of the largest used unorthodox medicinal systems having a wide number of principles and logic to treat and cure various diseases [1]. Many successful concepts like severe dilution to high agitation have been applied in the homeopathic system [2]. Though many concepts like different treatment for same diseases and many more are contradictory to the allopathic system [3], homeopathy has proved its worth in decreasing drug-related side effects in many arenas [4]. Various treatments and researches are carried out on various diseases; mostly homeopathic treatment is used in joint diseases, respiratory diseases, cancer, and gastrointestinal tract diseases [5]. In this chapter, readers will have a brief idea about many meta-analysis results of most common respiratory diseases, i.e., asthma, incurable hypertension condition, rheumatoid arthritis, and diarrhea and a megareview of all the diseases to see their unwanted effects, uses of drugs, concepts, and issues related to homeopathy [6]. Various limitations of homeopathic treatments are also highlighted which can give a clear idea about the future scope of research [7]. Overall, it can be concluded that placebo and homeopathic treatments give almost the same effect [8], but the less severe side effects of homeopathic drugs in comparison to all other treatment groups catch great attention [9].
Apart from the very poor English of the text and the fact that it has as good as nothing to do with the subject of ‘Homeopathy as a Therapeutic Option in Space’, I have the following brief comments:
- I did not know that homeopathy has ‘a wide number of logic’ and had alwas assumed that there is only one logic.
- Successful concepts? Really?
- So, homeopaths believe that the ‘allopathic system’ treats the same diseases uniformly? In this case, they should perhaps read up what conventional medicine really does.
- I am not aware of good evidence showing that homeopathy reduces drug related adverse effects.
- No, homeopathy is used for all symptoms – Hahnemann did not believe in treating disease entities – and mostly for those that are self-limiting.
- I love the term ‘incurable hypertension condition’; can somebody please explain what it is?
- The main limitation is that homeopathy is nonsense and, as such, does not really require further research.
- Not ‘almost’ but ‘exactly’! But thanks for pointing it out.
- Wishful thinking and not true. Firstly, the author forgot about ‘homeopathic aggravations’ in which homeopaths so strongly believe. Secondly, I know of many non-homeopathic treatments that are free of adverse effects when done properly.
Altogether, I am as disappointed by this article as you must be: we were probably all hoping to hear about the discovery showing that homeopathy works splendidly in space – not least because we have known for a while that homeopaths seem to be from a different planet.
The case of a 2.5-year-old boy who accidentally ingested a 25% sodium chlorite solution was reported. The solution had been recommended to the grandfather as a “bowel cure” by a naturopath. Although the boy tried to spit the solution out again, he was unable to do so or only partially succeeded. Vomiting and diarrhoea soon set in and the child’s condition deteriorated rapidly.
On admission to hospital, a greyish-pale skin colour, lip cyanosis and an oxygen saturation of 67% were already apparent. The child had to be intubated. Blood gas analysis revealed marked methaemoglobinaemia, which was treated with methylene blue and ascorbic acid. Erythrocyte concentrates were also transfused due to haemolytic anaemia. In the oesophagogastroduodenoscopy the next day, the gastric mucosa was completely covered with bloody erosions. Later, aspiration pneumonia was suspected and antibiotics with piperacillin and tazobactam i.v. were administered for five days. After clinical restitution, the child was discharged.
The author added the following comment:
Several health authorities (including in the USA, Switzerland, Canada and the UK) have issued warnings about MMS in recent years and in some cases have also taken specific measures to protect consumers. In July 2012, the German Federal Institute for Risk Assessment (BfR) strongly advised against the consumption and use of MMS.
In February 2015, the Federal Institute for Drugs and Medical Devices (BfArM) classified two MMS products as requiring authorisation. These were considered to be so-called presentation drugs because the manufacturer made clear healing promises and stated medicinal purposes. Furthermore, precise dosage information and references to the possibility of severe side effects such as diarrhoea and nausea were given, as well as references to the book “The Breakthrough” by Jim Humble, in which the use and effectiveness of MMS is described for malaria and cancer, for example. This means that the products would have to be authorised as medicinal products and could then only be placed on the market if the pharmaceutical company had proven their efficacy, quality and safety.
In addition, the BfArM categorised both products as questionable medicinal products in accordance with Section 5 of the German Medicinal Products Act because their use is associated with harmful effects that go beyond an acceptable level.
On this blog, we have repeatedly discussed the MMS, e.g.:
- Miracle Mineral Solution (MMS) = potentially lethal
- MMS-salesman Andreas Kalcker has been arrested in Argentina
- Beware of the ‘Bleach Boys’ – hydrogen peroxide and chlorine dioxide
I urge everyone who might be tempted to try MMS to think again.
Omega-3 fatty acids (fish oil) supplementation reduces the occurrence of cardiovascular disease (CVD) and CVD-related mortality in patients at high-risk of CVD and in patients with elevated plasma triglyceride level. Yet, some studies have found an increased risk of atrial fibrillation (AF). AF is the most common sustained cardiac arrhythmia worldwide. It is associated with high morbidity and mortality rates and significant public health burden. Previous studies of the effect of omega-3 fatty acids on AF occurrence have reported contradictory results.
This review evaluated the effect of omega-3 fatty acids on the risk of AF. The results suggest that omega-3 fatty acids supplementation is associated with increased AF risk, particularly in trials that used high doses. Therefore, several factors should be considered before prescribing omega-3 fatty acids, including their dose, type, and formulation (fish, dietary fish oil supplements, and purified fatty acids), as well as patient-related factors and atrial mechanical milieu. Because the benefits of omega-3 fatty acids are dose-dependent, the associated AF risk should be balanced against the benefit for CVD. Patients who take omega-3 fatty acids, particularly at high doses, should be informed of the risk of AF and followed up for the possible development of this common and potentially hazardous arrhythmia.
Another recent review included 54,799 participants from 17 cohorts. A total of 7,720 incident cases of AF were ascertained after a median 13.3 years of follow-up. In multivariable analysis, EPA levels were not associated with incident AF, HR per interquintile range (ie, the difference between the 90th and 10th percentiles) was 1.00 (95% CI: 0.95-1.05). HRs for higher levels of DPA, DHA, and EPA+DHA, were 0.89 (95% CI: 0.83-0.95), 0.90 (95% CI: 0.85-0.96), and 0.93 (95% CI: 0.87-0.99), respectively.
The authors concluded that in vivo levels of omega-3 fatty acids including EPA, DPA, DHA, and EPA+DHA were not associated with increased risk of incident AF. Our data suggest the safety of habitual dietary intakes of omega-3 fatty acids with respect to AF risk. Coupled with the known benefits of these fatty acids in the prevention of adverse coronary events, our study suggests that current dietary guidelines recommending fish/omega-3 fatty acid consumption can be maintained.
Faced with contradictory results based on non-RCT evidence, we clearly need an RCT. Luckily such a trial has recently been published. It was an ancillary study of a 2 × 2 factorial randomized clinical trial involving 25 119 women and men aged 50 years or older without prior cardiovascular disease, cancer, or AF. Participants were recruited directly by mail between November 2011 and March 2014 from all 50 US states and were followed up until December 31, 2017.
Participants were randomized to receive EPA-DHA (460 mg/d of EPA and 380 mg/d of DHA) and vitamin D3 (2000 IU/d) (n = 6272 analyzed); EPA-DHA and placebo (n = 6270 analyzed); vitamin D3 and placebo (n = 6281 analyzed); or 2 placebos (n = 6296 analyzed). The primary outcome was incident AF confirmed by medical record review.
Among the 25 119 participants who were randomized and included in the analysis (mean age, 66.7 years; 50.8% women), 24 127 (96.1%) completed the trial. Over a median 5.3 years of treatment and follow-up, the primary end point of incident AF occurred in 900 participants (3.6% of study population). For the EPA-DHA vs placebo comparison, incident AF events occurred in 469 (3.7%) vs 431 (3.4%) participants, respectively (hazard ratio, 1.09; 95% CI, 0.96-1.24; P = .19). For the vitamin D3 vs placebo comparison, incident AF events occurred in 469 (3.7%) vs 431 (3.4%) participants, respectively (hazard ratio, 1.09; 95% CI, 0.96-1.25; P = .19). There was no evidence for interaction between the 2 study agents (P = .39).
The authors concluded that among adults aged 50 years or older, treatment with EPA-DHA or vitamin D3, compared with placebo, resulted in no significant difference in the risk of incident AF over a median follow-up of more than 5 years. The findings do not support the use of either agent for the primary prevention of incident AF.
So, does the regular supplementation with omega-3 fatty acids increase the risk of atrial fibrillation? The evidence is not entirely clear but, on balance, I conclude that the risk is low or even non-existent.
It has just been reported that the Düsseldorf Regional Court has dismissed several lawsuits against vaccine manufacturers for alleged coronavirus vaccine damage as unfounded.
Three women and one man had filed a lawsuit against manufacturers of mRNA vaccines. They claimed to have suffered significant impairment and damage to their health as a result of the coronavirus vaccines. They claimed to have suffered from states of exhaustion, concentration disorders, damage to the immune system, respiratory and lung problems, autoimmune reactions and symptoms of myocarditis. The plaintiffs demanded compensation for pain and suffering of up to 250,000 euros and damages.
The court rejected the claims. The requirements for a claim under the German Medicinal Products Act were not met, the court stated. The plaintiffs had not sufficiently proven a “negative risk-benefit balance” of the vaccine. On the contrary, the European Medicines Agency (EMA) had determined a positive balance for the vaccine during the authorisation process.
Furthermore, the plaintiffs had not provided sufficient evidence that the manufacturer had provided incorrect information regarding the vaccine, the court continued. On the contrary, it follows from the official authorisation by the EMA that the manufacturer’s statements “are not objectionable in terms of content”. The judgements are not yet legally binding.
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I have little doubt that antivazers will now claim that the court is in the pocket of the pharmaceutical industry. To give you a flavour of their mindset, here are examples of recent tweets (Xs) that I picked up on the subject (my translations):
- You stupid arseholes and stupid rabble-rousers, and who is liable for the coronavirus vaccination damage and for the German arms factories in Ukraine?
- More and more vaccines, no long-term studies…not with me!
I make decisions about my body and you can see from the coronavirus vaccine damage that I have done everything right. Even if our government wants us to believe that there are none and pays the lawyers for Biontech. - Corona vaccination damage, disinformation, corona vaccination no protection, disinformation, that’s how it works with the anti-democrats.
- The Corona vaccine damage is also still being covered up. This political cesspit also stinks and needs to be emptied as quickly as possible.
- When the force-financed government TV reports on “vaccine damage”, more and more of the people’s traitors must be getting sick to their stomachs.
- For the “fact checkers”, facts are opinions – often even contradicting government statistics, e.g. in the case of coronavirus vaccinations – that are considered correct by the establishment. Necessary open discussions are not wanted by them.
There is growing evidence that substituting animal-based with plant-based foods is associated with a lower risk of cardiovascular diseases (CVD), type 2 diabetes (T2D), and all-cause mortality. The aim of this review was to summarize and evaluate the evidence for the substitution of any animal-based foods with plant-based foods on cardiometabolic health and all-cause mortality in a systematic review and meta-analysis.
The researchers systematically searched MEDLINE, Embase, and Web of Science to March 2023 for prospective studies investigating the substitution of animal-based with plant-based foods on CVD, T2D, and all-cause mortality. They calculated summary hazard ratios (SHRs) and 95% confidence intervals (95% CI) using random-effects meta-analyses. We assessed the certainty of evidence (CoE) using the GRADE approach.
In total, 37 publications based on 24 cohorts were included. The results are impressive:
- There was moderate CoE for a lower risk of CVD when substituting processed meat with nuts [SHR (95% CI): 0.73 (0.59, 0.91), n = 8 cohorts], legumes [0.77 (0.68, 0.87), n = 8], and whole grains [0.64 (0.54, 0.75), n = 7], as well as eggs with nuts [0.83 (0.78, 0.89), n = 8] and butter with olive oil [0.96 (0.95, 0.98), n = 3].
- There was moderate CoE for an inverse association with T2D incidence when substituting red meat with whole grains/cereals [0.90 (0.84, 0.96), n = 6] and red meat or processed meat with nuts [0.92 (0.90, 0.94), n = 6 or 0.78 (0.69, 0.88), n = 6], as well as for replacing poultry with whole grains [0.87 (0.83, 0.90), n = 2] and eggs with nuts or whole grains [0.82 (0.79, 0.86), n = 2 or 0.79 (0.76, 0.83), n = 2].
- Replacing red meat for nuts [0.93 (0.91, 0.95), n = 9] and whole grains [0.96 (0.95, 0.98), n = 3], processed meat with nuts [0.79 (0.71, 0.88), n = 9] and legumes [0.91 (0.85, 0.98), n = 9], dairy with nuts [0.94 (0.91, 0.97), n = 3], and eggs with nuts [0.85 (0.82, 0.89), n = 8] and legumes [0.90 (0.89, 0.91), n = 7] was associated with a reduced risk of all-cause mortality.
The authors concluded that their findings indicate that a shift from animal-based (e.g., red and processed meat, eggs, dairy, poultry, butter) to plant-based (e.g., nuts, legumes, whole grains, olive oil) foods is beneficially associated with cardiometabolic health and all-cause mortality.
I am not a vegetarian or vegan but have been interested in vegetarian diets for some time.
- In a 1997 review, I concluded that eating less meat is good advice; however, strict forms of vegetarianism are not entirely free of risks.
- And in 1986, we showed that, in vegetarians, blood and plasma viscosities were lower than in meat eaters. Stricter avoidance of animal products was associated with even lower values for these indices. These observations are in agreement with the fact that other low-cardiovascular-risk groups show better than average blood fluidity. They are consistent with the hypothesis that in vitro measurements of blood rheology may provide signs of early atherosclerotic changes in vivo.
The mechanisms by which a vegetarian diet bring about the health benefits are still not entirely clear and require more research. Likewise, we need more evidence on the question wether it is necessary to avoid all animal-based foods to generate the benefits. My reading of the evidence is that a reduction of such foods might suffice. Yet, the optimal balance is unclear as yet.
“Acute Fulminant Hepatic Failure in 23-Year-Old Female Taking Homeopathic Remedy” is not a title we see often on a scientific paper. Naturally, it attrackted my interest. In the paper, a US team presented a case of a 23-year-old otherwise healthy woman with body mass index 32.3 and a history of polycystic ovarian syndrome who presented with acute liver failure (ALF) ultimately requiring orthotopic liver transplantation. The patient was originally from India where she reported taking homeopathic medications for various indications for several years without known toxicity. She had no history of alcohol, tobacco, or other drug use. At the time of her presentation, she was living and working in the US and reported she was unable to refill her homeopathic product with the primary ingredient of eggshells from India. She was off of all medications and supplements with the exception of Berberis vulgaris for approximately 1 month before obtaining a similarly named homeopathic product with the primary ingredient of eggshells from Amazon. She reported originally taking 4 pills/d for 10 days, and then increased to 10 pills/d for 10 days as she was unsure of the appropriate dose.
She subsequently developed orange discoloration of her urine and nausea, reportedly without any preceding muscle-related effects or symptoms, and she discontinued all of her medications/supplements. Approximately 2 weeks later, she presented to the emergency department for nausea and malaise, where a blood test revealed abnormal liver enzymes. Mononucleosis screen and hepatitis panel were negative. She had no evidence of hepatic encephalopathy at that time. Ultrasound of the abdomen was notable for hypoechoic liver parenchyma only.
She was discharged home with gastroenterology telehealth follow-up. She was seen 1 week later and reported worsening nausea, vomiting, anorexia, jaundice, and fatigue. She presented to a local emergency department where she received intravenous vitamin K and underwent further laboratory evaluation. She was transferred to another hospital for higher level of care and admitted with acute liver injury. There she received intravenous N-acetylcysteine per institutional protocol, ursodiol, albumin, vitamin K, and fresh frozen plasma transfusions given for coagulopathy. Magnetic resonance cholangiopancreatography was performed and demonstrated no evidence of biliary obstruction or chronic liver disease (no ascites, contour nodularity, mass, or lymphadenopathy), though liver size noted to be small (11.5 cm in span). At 21 to 28 days after the onset of symptoms, her lab results were still highly abnormal and her mental status deteriorated. She was intubated for airway protection given severe encephalopathy, “cooling protocols” were initiated, and she was transferred again to a higher level of care at a center for emergent liver transplant evaluation. She was evaluated and listed as status 1A for acute liver failure. Her clinical status continued to decline and her labs continued to worsen.
An appropriate organ became available 28 hours after listing. At the time of her surgery, her explanted liver was noted to have massive parenchymal loss with hemorrhage, and pathology confirmed near complete collapse of the organ’s framework with only small foci of steatotic hepatocytes remaining. After her initial operation, her hospital course was complicated by coagulopathy, hypotension, leukocytosis, kidney failure requiring temporary dialysis, and multiple operations for completion of biliary anastomoses and delayed complex abdominal wall closure with mesh given large donor size. She was discharged from the hospital 2 weeks after transplant and her outpatient course continues to go well over 1 year after liver transplantation.
The product in this case has not been previously reported to be toxic. Its primary ingredient is calcium from “toasted eggshells,” which is also not generally known to cause liver failure or disease. However, the authors point out that it is not uncommon for supplements such as this one to contain other potentially toxic agents that are not specifically listed on the bottles’ label. For example, toxic metals including lead, mercury, and arsenic have reportedly been discovered in many (almost 20%) naturopathic medicines manufactured in India, particularly those sold by US websites. As such, the authors hypothesize that this patient’s ALF was likely caused by a contaminant (also consumed in higher quantities than intended) in her homeopathic product with the primary ingredient of eggshells.
The authors of this paper repeatedly state that the product was a homeopathic remedy; however, on other occasions they claim that it was a herbal supplement. In their Figure 1, they name the product as ‘OVA TOSTA’; on Amazon USA, I did indeed find a remedy by that name. Sadly, I was unable to obtain any information about its exact ingredients or composition.
Regardless whether the product was herbal or homeopathic, this case report is a poignant reminder that, in so-called alternative medicine (SCAM) many dangerous remedies are offered for sale. Therefore, it is advisible to be cautious and insist on sound information about the quality, safety, and efficacy before trying any such therapy.
Traditionally, strokes were considered a condition primarily affecting older adults. But in recent years, doctors have noticed a disturbing trend: the rise of stroke cases among younger adults, a demographic that was once considered low-risk. New data reveals an increase in the number of young adults facing an unexpected battle with strokes. Experts point to poor lifestyle choices as the main risk factor. Smoking, unhealthy diets, lack of exercise, and increased stress have played a role because they lead to problems like high cholesterol, high blood pressure and obesity.
But one risk factor most people don’t consider has to do with chiropractic adjustments. US doctors say forceful and rapid neck rotations during these procedures can potentially cause damage to the vertebral arteries supplying blood to the brain stem. “We see five, if it’s a bad year, up to eight or 10 a year per hospital, and some of them can be quite devastating because the brain stem and the cerebellum are in an enclosed compartment and that only so much room,” said Dr. Melissa McDonald, with McKay Dee Hospital.
Stroke symptoms in young adults are similar to those seen in older adults: weakness or numbness in the face, arm, or leg; sudden change in speech, difficulty walking or keeping your balance; and sudden severe headaches and change in vision. Any of these symptoms require immediate medical attention, but doctors say younger adults tend to wait longer than older adults to go to the ER.
Dr. McDonald says younger adults face an increased risk of complications from brain swelling following a stroke due to the relatively larger size of their brains within the skull compared to older individuals.
Readers of this blog can hardly be surprised by this news. I have often enough reported on the fact that chiropractic adjustments can cause a stroke, e.g.:
- Another case of stroke due to chiropractic
- One chiropractic treatment followed by two strokes
- Cervical artery dissection and stroke related to chiropractic manipulation
- An unusual case report of a stroke caused by chiropractic neck manipulation
- New data on the risk of stroke due to chiropractic spinal manipulation
- Chiropractic neck manipulation can cause stroke
And what is the solution?
I’m glad you asked; it is simple! In the words of one neurologists:
DON’T LET THE BUGGARS TOUCH YOUR NECK!
It has been reported that a cancer patient died of multiple organ failure after he took a herbalist’s remedy that included mistletoe. Retired electrician Haydn Owen Jones had been receiving a third course of treatment for his multiple myeloma when he turned to a herbalist. Alongside two chemotherapy drugs and a steroid, Jones started using a remedy which included mistletoe, yarrow, lily of the valley, cat’s claw, echinacea, and corn silk. Days later he fell ill with a fever, swelling and a rash. He was treated for sepsis but never recovered as his liver function deteriorated. Coroner concluded that it was probable the mix of cancer drugs and the alternative therapy proved deadly to him.
Mistletoe contains Phoratoxin and Viscotoxin – both of which are poisonous when ingested. While a more severe reaction is caused from eating the berries than the leaves, possible symptoms can include nausea, heart problems and fever.
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As with all tragic cases of this nature, it is difficult or even impossible to establish what caused the death. Was the herbal remedy involved at all? If so, it could be the toxicity of one or more of its ingredients, interactions between them, interactions with prescribed drugs, or contaminations/adulterations of the remedy. If there is a lesson at all to learn from this case, it is, I think, this: be very cautious about using herbal remedies, particularly when combined with other medicines, and seek professional advice, preferably NOT from a herbalist.
How often have we heard that, even if so-called alternative medicine (SCAM) does not improve the more tangible health outcomes, at least it does improve the quality of life of those who use it. But is that popular assumprion correct?
The present study investigated the use of SCAM and its relationship with health-related quality of life (HRQOL) in patients with type 2 diabetes mellitus. A total of 421 patients with type 2 diabetes mellitus who met the inclusion criteria were recruited in this cross-sectional study. The researchers recorded the use of SCAM, such as:
- supplements,
- Kampo,
- acupuncture,
- yoga.
HRQOL was assessed by EuroQOL.
A total of 161 patients (38.2%) with type 2 diabetes mellitus used some type of SCAM. The use of supplements and/or health foods was the highest among SCAM users (112 subjects, 26.6%). HRQOL was significantly lower in patients who used some SCAM (0.829 ± 0.221) than in those without any SCAM use (0.881 ± 0.189), even after adjustments for confounding factors [F(1, 414) = 2.530, p = 0.014].
The authors concluded that proper information on SCAM is needed for patients with type 2 diabetes mellitus.
We have often discussed whether SCAM use improves or reduces QoL. The evidence is mixed.
Some studies of often poor quality suggest that SCAM improves QoL, e.g.:
- Can massage improve the quality of life?
- The effect of acupuncture on myelosuppression and quality of life in women with breast cancer
- SCAM-Use and Quality of Life in Patients with Breast Cancer
- Acupuncture is said to improve the quality of life of migraineurs, but I am unconvinced
- Yoga improves quality of life, fatigue and sleep of breast cancer patients
However, other studies suggest that SCAM has no effect or even reduces QoL, e.g.:
- Mistletoe for cancer: Does it improve patients’ quality of life?
- Alternative therapies: do they really improve the quality of life of cancer patients?
- Chiropractic improves quality of life: another bogus claim?
- Homeopathy for cancer? Unsurprisingly, the evidence is not positive.
- Multidisciplinary versus chiropractic care for low back pain
- Use of alternative medicine hastens death of cancer patients
The authors of the present study contribute further evidence to the discussion:
Huo et al. evaluated HRQOL in 17,923 patients with bronchial asthma using the Behavioral Risk Factor Surveillance System, and showed that HRQOL was significantly lower in patients with than in those without the use of CAM [25]. Opheim et al. also demonstrated that HRQOL was significantly lower in inflammatory bowel disease (IBD) patients with than in those without the use of CAM [26]. These findings indicate that the use of some CAM is associated with lower HRQOL. Consistent with previous findings, HRQOL was significantly lower in patients with the use of some CAM than in those without any CAM in the present study.
The issue is obviously complex. Findings would depend on the type of patient and the form of SCAM as well on a multitude of other factors. Moreover, it is often unclear what was the cause and what the effect: did SCAM cause low (or high) QoL or did the latter just prompt the use of the former?
In view of this confusion, it is probably safe to merely conclude that the often-heard blanket statement that SCAM improves QoL is not nearly as certain as SCAM enthusiasts want it to be.
This systematic review aimed to assess the impact of Tai Chi on individuals with essential hypertension and to compare the effects of Tai Chi with other therapies. The researchers conducted a systematic literature search of the Medline, Scholar, Elsevier, Wiley Online Library, Chinese Academic Journal (CNKI) and Wanfang databases from January 2003 to August 2023. Using the methods of the Cochrane Collaboration Handbook, a meta-analysis was conducted to assess the collective impact of Tai Chi exercise in controlling hypertension. The primary outcomes measured included blood pressure and nitric oxide levels.
A total of 32 RCTs were included. The participants consisted of adults with an average age of 57.1 years who had hypertension (mean ± standard deviation systolic blood pressure at 148.2 ± 12.1 mmHg and diastolic blood pressure at 89.2 ± 8.3 mmHg). Individuals who practiced Tai Chi experienced reductions in systolic blood pressure of 10.6 mmHg, diastolic blood pressure of 4.7 mmHg and an increase in nitric oxide levels.
The authors concluded that Tai Chi can be a viable lifestyle intervention for managing hypertension. Greater promotion of Tai Chi by medical professionals could extend these benefits to a larger patient population.
Tai Chi allegedly incorporates principles rooted in the Yin and Yang theory, Chinese medicine meridians and breathing techniques, and creates a unique form of exercise characterized by its inward focus, continuous flow, the balance of strength and gentleness, and alternation between fast and slow movements. What sets Tai Chi apart from other forms of excercise is the requirement for mindful guidance during practice. This aspect may, according to the authors, be the reason why Tai Chi also outperforms general aerobic exercise in managing hypertension.
I can well imagine that any form of relaxation reduces blood pressure. What I find hard to believe is that Tai Chi is better than any other relaxing SCAMs. The 32 RCTs included in this new review fail to impress me because they are all from China, and – as we have often mentioned before – studies from China are to be taken with a pinch of salt.
Yet, the subject is important enough, in my view, to merit a few rigorous trials conducted by independent researchers. Until such data are available, I think, I prefer to rely on our own systematic review which conculded that the evidence for tai chi in reducing blood pressure … is limited. Whether tai chi has benefits over exercise is still unclear. The number of trials and the total sample size are too small to draw any firm conclusions.
