It absolutely wasn't the case that Panorama had set off to prove that product X didn't work. You can read the research behind the programme. Oxford Uni had a predefined protocol for the study (as happens with science) that was to see what the science underpinning claims was. We had no idea what would happen before we started out.Given companies invest so much money into the science, it's disappointingly poor quality. I'm not convinced that some of these multi-billion dollar companies are unable to fund rigorous research.
I agree that absence of evidence is not evidence of absence - but that's not what people are buying into. They're buying into stuff on the notion that it's backed up with good science. That's simply not the case.
We have published the letter that went out to companies:
Dear xxx,
I am writing on behalf of a team of researchers from the BMJ (British Medical Journal) and the Centre of Evidence Based Medicine at Oxford University.
In the run up to the 2012 Olympics we are undertaking a piece of research analysing the evidence for sports health products. This will appear in the BMJ. Since we are on a very tight deadline we would appreciate your answers by the end of the week (18th May).
So far, we have used pieces of published research where possible. But we are aware that this might be the complete picture.
On your website you have listed the following references to scientific articles as evidence for
[Product names here]
Because we are trying to evaluate the evidence base across a range of products fairly, we would like to be sure that this represents a complete list of scientific articles that you have used to demonstrate how these products work.
[Found references here]
Do you think you could tell us:
If this is a complete list?
If not, what other data you have used to support your claims?
Is this published or unpublished?
If the research is published could you provide us with the relevant references?
If your research is unpublished, would you be willing to share it with us so we can fairly evaluate how your product works?
Please note, we are aiming to capture everything as accurately and fairly as we can. If you are unable to provide us with further information we will also note this in our research.
Don’t hesitate to contact us for further information, but we would appreciate a prompt response.