This revealing chart shows exactly where a number of dietary supplements and popular treatments lie in relation to the actual scientific evidence supporting the claims made for them.

*Addendum

I have received comments that Omega3 appears more than once in the above chart. This is because there are a variety of claims made against the supplement and the chart attempts to show the level of evidence with regard to the different claims. The designers have produced another graphic which is hopefully a little more clear on these points so I have added this below.