The 'randomized placebo controlled trial' is often considered the 'gold standard' of evidence for medicine of any kind.  When it comes to pharmacutical drugs, this isn't a big problem - patients are given either the real medicine, or a placebo version that has no physiological effects.  Neither the patient nor the person giving the medicine knows whether it is real or not, and therefore with a large enough sample size (number of patients), firm conclusions can be drawn about the efficacy of the drug.  

However, when it comes to acupuncture, how do you apply a placebo needle?  One attempt to provide a placebo control is to neelde some patients at 'real' acupuncture points, and others in places not considered as 'real' according to the text books.  The problem with this is that putting needles anywhere has measurable physiological effects such as endorphin release, and therefore cannot be considered an inert placebo.  This, in my view, is one reason why so many trials show little or no differrence between the 'real' and 'sham' groups.  

Another factor is the administration of the acupuncture - who gives the 'treatments' in these trials?  By no means is it always performed by fully trained traditional acupuncturists, and often it is very unclear what rationale was used for the selection of points, or whether consideration was given to needling technique etc.  In my opinion these are vital elements to the outcome of a treatment.  Like many other acupuncturists, I have spent years honing my diagnostic, palpation and needling skills, (and I'm still just scratching the surface!), and I find it unsurprising that the results of some trials are unimpressive when the practitioners used are minimally trained and are restricted to (sometimes illogical) standardised groups of points.    

However, despite these issues, there is a growing body of evidence that is demonstrating the powerful effects of acupuncture.  The ARRC (Acupuncture Research Resource Centre) was established by the British Acupuncture Council to collect data, and generate new research.  The intention is to provide an accurate and unbiased summary of current research, and how acupuncture may be beneficial.  They provide fact sheets and review papers covering the conditions listed below (please note, I am not suggesting acupuncture has yet been 'proven' to treat all these conditions):  

Acupuncture Research Resource Centre fact sheets:

Migraine and headache

Stroke

Arthritis

Gynaecology

Menopause

Asthma

Depression

Anxiety

Obstetrics

Obstetrics 2

Sports injuries

Infertility

Allergies

Impotence

Prostate disorders

It should be noted - especially in light of all the above - that the complex task of assessing acupuncture scientifically is still very much in its infancy.  Although there may not currently be a long list of conditions 'proven' unequivocally to respond well to acupuncture, I expect this list to grow steadily as research methods improve.  

Tom runs clinics in Bristol.  Please don't hesitate to contact him to discuss whether acupuncture may be helpful for you.

You should always consult your GP if you have any concerns about your health.

Tom Kennedy Acupuncture & Tuina Bristol