Monthly Archives: October 2012
Whenever I lecture on the topic of alternative medicine for cancer, the first comment from the audience usually is “aren’t there any herbal treatments that are effective?” This is of course a most reasonable question; after all, many conventional cancer drugs originate from the plant kingdom – think of Taxol, for instance.
My answer often upsets believers in alternative cancer remedies. I tell them that, no, there is none and, even worse, there never will be one.
Did I just contradict myself? Did I not just state that many cancer drugs come from plants? Yes, but once the pure ingredient is isolated and synthetized, the drug ceases to be an herbal remedy which is defined as an extract of all the plant’s ingredients, not just one isolated constituent.
And why am I so depressingly pessimistic about there ever being an herbal cancer cure? Because of a simple fact: as soon as a natural substance shows the slightest promise, scientists will analyse and test it. If this process turns out to be successful, we will have a new cancer drug – but not an effective herbal remedy. Again, think of Taxol.
Since almost a decade, colleagues and I have been working on a relatively little-known project called CAM cancer. It started as an EU-funded activity and is now coordinated by Norwegian researchers. Our main aim is to provide unbiased and reliable information about all sorts of alternative treatments for cancer.
Our team is large, hard-working, highly motivated and independent – we do not accept sponsorship from anyone who might want to influence the results of what we are publishing. It is probably fair to say that most individuals who give their time working for CAM cancer are more optimistic than I regarding the value of alternative treatments. Therefore, our publications are certainly not biased against them; if anything, they are a bit on the generous side.
Much of our work consists in generating rigorously researched and fully referenced summaries of the evidence. Before these get published, they are thoroughly peer-reviewed and, whenever necessary, they also get updated to include the newest data. A good proportion of the reviews relates to herbal treatments.
Here are the crucial bits from our conclusions about those herbal cancer remedies which we have so far investigated:
Aloe vera: …studies are too preliminary to tell whether it is effective.
Artemisia annua: …there is no evidence from clinical trials…
Black cohosh: …In all but one trial black cohosh extracts were not superior to placebo.
Boswellia: …No certain conclusions can be drawn…
Cannabis: …The use of cannabinoids for anorexia-cachexia-syndrome in advanced cancer is not supported by the evidence…
Carctol: … is not supported by evidence…
Chinese herbal medicine for pancreatic cancer: …the potential benefit… is not strong enough to support their use…
Curcumin: There is currently insufficient documentation to support the effectiveness and efficacy of curcumin for cancer…
Echinacea: …there is currently insufficient evidence to support or refute the claims… in relation to cancer management.
Essiac: There is no evidence from clinical trials to indicate that it is effective…
Garlic: Only a few clinical trials exist and their results are inconclusive.
Green tea: …the findings… are still inconclusive.
Milk vetch: Poor design and low quality… prohibit any definite conclusions.
Mistletoe: …the evidence to support these claims is weak.
Noni: …evidence on the proposed benefits in cancer patients is lacking…
PC-Spes: …the… contamination issues render these results meaningless. An improved PC-Spes2 preparation was evaluated in an uncontrolled study which did not confirm the encouraging results…
St John’s wort: …there are no clinical studies to show that St. John’s wort would change the natural history of any type of cancer…
Ukrain: …several limitations in the studies prevent any conclusion.
As you can see, so far, we have not identified a single herbal cancer treatment that demonstrably alters the natural history of cancer in a positive direction. To me, this suggests that my rather bold statements above might be correct.
Of course, there will be some enthusiasts who point out that the list is not complete; and they, of course, are correct: there are probably hundreds of herbal remedies that we have not yet dealt with. And, of course, for some of those the evidence might be more convincing – but somehow I doubt it; after all, we did try to tackle the most promising herbal remedies first.
My claim therefore stands: there never will be a herbal (or other alternative) cancer cure. But, please, feel free to convince me otherwise.
Guest post by Louise Lubetkin
A few months ago The Economist ran one of its Where Do You Stand? polls asking readers whether alternative medicine should be taught in medical schools:
In Britain and Australia, horrified scientists are fighting hard against the teaching of alternative therapies in publicly funded universities and against their provision in mainstream medical care. They have had most success in Britain. Some universities have been shamed into ending alternative courses. The number of homeopathic hospitals in Britain is dwindling. In 2005 the Lancet, a leading medical journal, declared “the end of homeopathy”. In 2010 a parliamentary science committee advised that “the government should not endorse the use of placebo treatments including homeopathy.” So, should alternative medicine be treated on a par with the traditional sort and taught in medical schools?
It may surprise you to discover that more than two thirds of the almost 43,000 respondents were of the opinion that yes, it should.
Given that the use of alternative therapies is now so widespread, a plausible case can be made for giving medical students a comprehensive overview of the field as part of their training. But that’s not at all what the poll asked. Here again is how it was worded:
So, should alternative medicine be treated on a par with the traditional sort and taught in medical schools? (emphasis added)
That such a hefty majority of those who responded – and Economist readers are generally affluent and well-educated – came out firmly in favour not just of the teaching of alternative medicine but explicitly of parity between it and standard medicine, is both a reflection of the seemingly unstoppable popularity of alternative medicine and also, in a wider sense, of just how respectable it has become to be indifferent to, or even overtly hostile towards science.
It is ironic that since its very first issue in 1843 The Economist has proudly displayed on its contents page a mission statement declaring that the magazine is engaged in “a severe contest between intelligence, which presses forward, and an unworthy, timid ignorance obstructing our progress.”
It would seem that a significant sample of its poll-answering readership has a somewhat distorted vision of the struggle between intelligence and ignorance. In this postmodern worldview truth is relative: science is simply one version of reality; anti-science is another – and the two carry equal weight.
The very term “alternative medicine” – I use that expression with the greatest reluctance – is itself an outgrowth of this phenomenon, implying as it does that there are two valid, indeed interchangeable, choices in the sphere of medicine, a mainstream version and a parallel and equally effective alternative approach. That the term “alternative medicine” has now so seamlessly entered our language is a measure of how pervasive this form of relativism has become.
In fact, alternative medicine and mainstream medicine are absolutely not equivalent, nor are they by any means interchangeable, and to speak about them the way one might when debating whether to take the bus or the subway to work – both will get you there reliably – constitutes an assault on truth.
How did alternative medicine, so very little of which has ever been conclusively shown to be of even marginal benefit, achieve this astounding degree of acceptance?
Certainly the pervasive and deeply unhealthy influence of the pharmaceutical industry over the practice of medicine has done much to erode public confidence in the integrity of the medical profession. Alternative medicine has nimbly stepped into the breach, successfully casting itself as an Everyman’s egalitarian version of medicine with a gentle-sounding therapeutic philosophy based not on pharmaceuticals with their inevitable side effects, but on helping the body to heal itself with the assistance of “natural” and freely available remedies.
This image of alternative medicine as a humble David bravely facing down the medico-pharmaceutical establishment’s bullying Goliath does not, however, stand up well to scrutiny. Alternative medicine is without question a hugely lucrative enterprise. Moreover, unlike the pharmaceutical industry or mainstream medicine, it is almost entirely unregulated.
According to the US National Institutes of Health, in 2007 Americans spent almost $40 billion out of their own pockets (i.e., not reimbursed by health insurance) on alternative medicine, almost $12 billion of which was spent on an estimated 350 million visits to various practitioners (chiropractors, naturopaths, massage therapists, etc.) The remaining $28 billion was spent on non-vitamin “natural” products for self-care such as fish oils, plant extracts, glucosamine and chondroitin, etc. And that’s not all: on top of this, sales of vitamin and nutritional supplements have been estimated to constitute a further $30 billion annually.
And then, of course, there’s the awkward fact of its almost total lack of effectiveness.
Look at it this way: illness is the loneliest and most isolating of all journeys. In that bleak landscape, scientifically validated medicine is not just the best compass and the most reliable map; it’s also the truest friend any of us can have.
So, should alternative medicine be treated on a par with the traditional sort and taught in medical schools?
Not on your life.
Is acupuncture an effective treatment for pain? This is a question which has attracted decades of debate and controversy. Proponents usually argue that it is supported by good clinical evidence, millennia of tradition and a sound understanding of the mechanisms involved. Sceptics, however, tend to be unimpressed and point out that the clinical evidence of proponents often is cherry-picked, that a long history of usage is fairly meaningless, and that the alleged mechanisms are tentative at best.
This discrepancy of opinions is confusing, particularly for lay people who might be tempted to try acupuncture. But it might vanish in the light of a new, comprehensive and unique evaluation of the clinical evidence.
An international team of acupuncture trialists published a meta-analysed of individual patient data to determine the analgesic effect of acupuncture compared to sham or non-acupuncture control for the following 4 chronic pain conditions: back and neck pain, osteoarthritis, headache, and shoulder pain. Data from 29 RCTs, with an impressive total of 17 922 patients, were included.
The results of this new evaluation suggest that acupuncture is superior to both sham and no-acupuncture controls for each of these conditions. Patients receiving acupuncture had less pain, with scores that were 0.23 (95% CI, 0.13-0.33), 0.16 (95% CI, 0.07-0.25), and 0.15 (95% CI, 0.07-0.24) SDs lower than those of sham controls for back and neck pain, osteoarthritis, and chronic headache, respectively; the effect sizes in comparison to no-acupuncture controls were 0.55 (95% CI, 0.51-0.58), 0.57 (95% CI, 0.50-0.64), and 0.42 (95% CI, 0.37-0.46) SDs.
Based on these findings, the authors reached the conclusion that “acupuncture is effective for the treatment of chronic pain and is therefore a reasonable referral option. Significant differences between true and sham acupuncture indicate that acupuncture is more than a placebo. However, these differences are relatively modest, suggesting that factors in addition to the specific effects of needling are important contributors to the therapeutic effects of acupuncture”.
Only hours after its publication, this new meta-analysis was celebrated by believers in acupuncture as the strongest evidence yet on the topic currently available. Much of the lay press followed in the same, disappointingly uncritical vein.The authors of the meta-analysis, most of whom are known enthusiasts of acupuncture, seem entirely sure that they have provided the most compelling proof to date for the effectiveness of acupuncture. But are they correct or are they perhaps the victims of their own devotion to this therapy?
Perhaps, a more sceptical view would be helpful – after all, even the enthusiastic authors of this article admit that, when compared to sham, the effect size of real acupuncture is too small to be clinically relevant. Therefore one might argue that this meta-analysis confirms what critics have suggested all along: acupuncture is not a useful treatment for clinical routine.
Unsurprisingly, the authors of the meta-analysis do their very best to play down this aspect. They reason that, for clinical routine, the comparison between acupuncture and non-acupuncture controls is more relevant than the one between acupuncture and sham. But this comparison, of course, includes placebo- and other non-specific effects masquerading as effects of acupuncture – and with this little trick ( which, by the way is very popular in alternative medicine), we can, of course, show that even sugar pills are effective.
I do not doubt that context effects are important in patient care; yet I do doubt that we need a placebo treatment for generating such benefit in our patients. If we administer treatments which are effective beyond placebo with kindness, time, compassion and empathy, our patients will benefit from both specific and non-specific effects. In other words, purely generating non-specific effects with acupuncture is far from optimal and certainly not in the interest of our patients. In my view, it cannot be regarded as not good medicine, and the authors’ conclusion referring to a “reasonable referral option” is more than a little surprising in my view.
Acupuncture-fans might argue that, at the very minimum, the new meta-analysis does demonstrate acupuncture to be statistically significantly better than a placebo. Yet I am not convinced that this notion holds water: the small residual effect-size in the comparison of acupuncture with sham might not be the result of a specific effect of acupuncture; it could be (and most likely is) due to residual bias in the analysed studies.
The meta-analysis is strongly driven by the large German trials which, for good reasons, were heavily and frequently criticised when first published. One of the most important potential drawbacks was that many participating patients were almost certainly de-blinded through the significant media coverage of the study while it was being conducted. Moreover, in none of these trials was the therapist blinded (the often-voiced notion that therapist-blinding is impossible is demonstrably false). Thus it is likely that patient-unblinding and the absence of therapist-blinding importantly influenced the clinical outcome of these trials thus generating false positive findings. As the German studies constitute by far the largest volume of patients in the meta-analysis, any of their flaws would strongly impact on the overall result of the meta-analysis.
So, has this new meta-analysis finally solved the decades-old question about the effectiveness of acupuncture? It might not have solved it, but we have certainly moved closer to a solution, particularly if we employ our faculties of critical thinking. In my view, this meta-analysis is the most compelling evidence yet to demonstrate the ineffectiveness of acupuncture for chronic pain.
Last Friday, it was announced in Vienna that Prof Harald Walach is the recipient of a prestigious award. The Austrian ‘Society for Critical Thinking’ wanted to officially recognise Walach for his “unique effort to introduce science-free theories into academia“.
Walach is professor at the Europa-Universitaet Viadrina where he investigates alternative medicine as well as much more exotic subjects. During recent months, Walach made headlines because he had published research allegedly showing that, with the use of a “Kozyrev mirror“, one can open channels of time and space and make telepathy a reality.
In the laudatio, it was pointed out that Walach’s claim to fame is his attempt to render bullshit more respectable by pressing it through the channels of his university. The end result, the speaker stressed, is not that bullshit becomes non-bullshit, but that the university stinks.
Most of Walach’s research is in the area of the more implausible end of the alternative medicine spectrum, e.g. homeopathy and spiritual healing. He also is the editor in chief of a journal specialised in alternative medicine which virtually never publishes a negative result and where he frequently promotes his bizarrely irrational concepts.
Crucially, Walach is a member of the scientific advisory board of CAM-media-watch a blog run by Claus Fritzsche and sponsored by the homeopathic manufacturer Heel who also happens to be the donor for Walach’s university chair. Fritzsche and Walach have many things in common, not just the sponsor or the obsession with irrationality but also the fact that they frequently and unfairly attack me and my work.
I would like to take this opportunity to congratulate Walach for this remarkable award — they could not have found a more deserving pseudo-scientist!
We all remember the libel case of the British Chiropractic Association (BCA) against Simon Singh, I’m sure. The BCA lost, and the chiropractic profession was left in disarray.
One would have thought that chiropractors have learnt a lesson from this experience which, after all, resulted in a third of all UK chiropractors facing disciplinary proceedings. One would have thought that chiropractors had enough of their attempts to pursue others when, in fact, they themselves were clearly in the wrong. One would have thought that chiropractors would eventually focus on providing us with some sound evidence about their treatments. One would have thought that chiropractors might now try to get their act together.
Yet it seems that such hopes are being sorely disappointed. In particular, chiropractors continue to attack those who have the courage to publicly criticise them. The proof for this statement is that, during the last few months, chiropractors took direct or indirect actions against me on three different occasions.
The first complaint was made by a chiropractor to the PRESS COMPLAINTS COMMISSION (PCC). The GUARDIAN had commented on a paper that I had just published which demonstrated that many trials of chiropractic fail to mention adverse effects. If nothing else, this omission amounts to a serious breach of publication ethics and is thus not a trivial matter. However, the chiropractor felt that the GUARDIAN and I were essentially waging a war against chiropractors in order to tarnish the reputation and public image of chiropractors. The PCC considered the case and promptly dismissed it.
The second complaint was made by a local chiropractor to my university. He alleged that I had been generally unfair in my publications on the subject and, specifically, he claimed that, in a recent systematic review of deaths after chiropractic treatments, I had committed what he called “research misconduct”. My university considered the case and promptly dismissed it.
The third and probably most significant complaint was also made by a chiropractor directly to my university. This time, the allegation was that I had fabricated data in an article published as long ago as 1996. The chiropractor in question had previously already tried three times to attack me through complaints and through his publications. Crucially, several years ago he had filed a formal complaint with the General Medical Council (GMC) claiming that, in my published articles, I systematically and wilfully misquoted the chiropractic literature. At the time, the GMC had ruled that his accusation had been unfounded.
Presumably to increase his chances of success for his fourth attempt, his new complaint to my university was backed up by a supporting letter from the WORLD FEDERATION OF CHIROPRACTIC. This document stated that my publications relating to the risks of chiropractic had “serious scientific shortcomings” and suggested that Exeter University “publicly distance itself from Prof Ernst’s publications on chiropractic, to enhance the reputation of the university”. My university peers considered the case and promptly dismissed it.
At this point, I should perhaps explain that my university has, in the past, been less than protective towards me. During the last decade or so, complaints angainst me had become a fairly regular occurrence, and invariably, my peers have taken them very seriously. When the first private secretary of Charles Windsor filed one, they even deemed it appropriate to conduct an official 13 month long investigation into my alleged wrong-doings. Thus my peers’ dismissal of the two chiropractors’ claims indicates to me that their two recent complaints must have been truly and utterly devoid of substance.
The three deplorable episodes summarised here speak for themselves, I think. I will therefore abstain from further comments and am delighted to leave this task to the readers of this blog.
Cancer patients are understandably desperate to try every treatment that promises a cure. They often turn to the Internet where they find thousands of “alternative” cancer cures being sold often for exorbitant cost. One of them is Ukrain.
Ukrain is based on two natural substances: alkaloids from the Greater Celandine and Thiotepa. It was developed by Dr Wassil Nowicky who allegedly cured his brother’s testicular cancer with his invention. Despite its high cost of about £50 per injection, Ukrain has become popular in the UK and elsewhere.
Ukrain has its name from the fact that the brothers Nowicky originate from the Ukraine, where also much of the research on this drug was conducted. When I say much, I should stress that I use this word in relative terms. In the realm of “alternative” cancer cures, we often find no clinical studies at all. For Ukrain, however, the situation is refreshingly different; there are a number of trials, and the question is, what do they really tell us?
In 2005, we decided to review all the clinical studies which had tested the efficacy of Ukrain. Somewhat to our surprise, we found 7 randomised clinical trials. Even more surprising, we thought, was the fact that all of them reported baffling cure rates. So, were we excited to have identified a cure for even the most incurable cancers? The short answer to this question is NO.
All of the trials were methodologically weak; but, as this is not uncommon in the area of alternative medicine, it did not irritate us all that much. Far more remarkable was the fact that these studies seemed to be odd in several other ways.
Their results seemed too good to be true; all but one trial came from the Ukraine where research governance might have been less than adequate. The authors of the studies seemed to overlap and often included Nowicky himself. They were published in only two different journals of little impact. The only non-Ukrainian trial came from Germany and was not much better: its lead author happened to be the editor of the journal where it was published; more importantly, the paper lacked crucial methodological details, which rendered the findings difficult to interpret, and the trial had a tiny sample size.
Collectively, these circumstances were enough for us to be very cautious. Consequently, we stated that “numerous caveats prevent a positive conclusion”.
Despite our caution, this article became much cited, and cancer centres around the world began to wonder whether they should take Ukrain more seriously; many integrative cancer clinics even started using the drug in their clinical routine. Dr Nowicky, who meanwhile had established his base in Vienna from where he marketed his drug, must have been delighted.
Soon, numerous websites sprang up praising Ukrain: “It is the first medicament in the world that accumulates in the cores of cancer cells very quickly after administration and kills only cancer cells while leaving healthy cells undamaged. Its inventor and patent holder Dr Wassil Nowicky was nominated for the Nobel Prize for this medicament in 2005…” .
Somehow, I doubt this thing with the Nobel Prize. What I do not question for a minute, however, is this press release by the Austrian police: since January, the Viennese police have been investigating Dr Nowicky. During a “major raid” on 4 September 2012, he and his accomplices were arrested under the suspicion of commercial fraud. Nowicky was accused of illegally producing and selling the unlicensed drug Ukrain. The financial damage was estimated to be in the region of 5 million Euros.
I fear, however, that the damage done on desperate cancer patients across the world might be much greater. Generally speaking, “alternative” cancer cures are not just a menace, they are a contradiction in terms: there is no such a thing and there will never be one. If tomorrow this or that alternative remedy shows some promise as a cancer cure, it will be investigated by mainstream oncology with some urgency; and if the findings turn out to be positive, the eventual result would be a new cancer treatment. To assume that oncologists might ignore a promising treatment simply because it originates from the realm of alternative medicine is idiotic and supposes that oncologists are mean bastards who do not care about their patients – and this, of course, is an accusation which one might rather direct towards the irresponsible purveyors of “alternative” cancer cures.
Why another blog offering critical analyses of the weird and wonderful stuff that is going on in the world of alternative medicine? The answer is simple: compared to the plethora of uncritical misinformation on this topic, the few blogs that do try to convey more reflected, sceptical views are much needed; and the more we have of them, the better.
But my blog is not going to provide just another critique of alternative medicine; it is going to be different, I hope. The reasons for this are fairly obvious: I have researched alternative medicine for two decades. My team and I have conducted about 40 clinical trials and published more than 100 systematic reviews of alternative medicine. We were by far the most productive research unit in this area. For 14 years, we hosted an annual international conference for researchers in this field. I know many of the leading investigators personally, and I understand their way of thinking. I have rehearsed every possible argument for or against alternative medicine dozens of times.
In a nutshell, I am not someone who judges alternative medicine from the outside; I come from within the field. Arguably, I am the only researcher in this area who is willing [or capable?] to state publicly what is wrong with alternative medicine. This is perhaps one of the advantages of being an emeritus professor!
People who have criticised this or that alternative therapy without first-hand experience of it have always been dismissed by believers as ill-informed; the argument usually is “this guy does not know what he is talking about”. Thus criticism from the outside was hardly ever taken seriously by those who needed it most. Yet it would be difficult to dismiss my arguments on such grounds: I can demonstrate that I have first-hand experience and know what I am talking about. I am clearly not an outsider.
People who criticise alternative medicine tend to claim that all of it is unscientific rubbish which we should discard. However, I am not convinced that this opinion is correct. I aim to adhere to the principles of evidence-based medicine and know that they can be applied to alternative medicine as much as to any other area of healthcare. This means that I will not dismiss everything that comes under the umbrella of alternative medicine. Our research has shown some treatments to work for some conditions, and where this is the case, I will always say so.
What follows is, I think, quite simple: this blog will differ from other blogs on the subject. It will provide critical evaluation because, in my view, this is what is needed. But it will not engage in wholesale alternative medicine-bashing. Most importantly, it will provide comments and perspectives that are based on many years of conducting and publishing research in this area.
Since first writing these lines, it has occurred to me that it might be nice to welcome a few guest-bloggers to express their opinions. Anyone who feels like contributing should therefore contact me, and we will see what we can work out.
Before we start discussing some of the the issues around alternative medicine, let me establish a few ground rules for the debates on this blog. I do like clearly expressed views and intend to be as outspoken as politeness allows. I hope that commentators will do the same, no matter whether they agree or disagree with me. Yet a few, simple, principles should be observed by everyone commenting on my blog.
Libellous statements are not allowed.
Comments must be on topic.
Nothing published here should be taken as medical advice.
All my statements are comments in a legal sense.
Conflicts of interest should always be disclosed.
I will take the liberty of stopping the discussion on any particular topic, if I feel that enough has been said and things are getting boring or repetitive.