Some internet-bought diet pills, unsurpisingly, have turned out to contain potentially dangerous ingredients. I referred to contaminated supplements in my post on Jeremy Piven (although these related to levels of heavy metals in herbal medicines) and now the Daily Mail have printed a story about products “promoted as ‘natural’ fat busters, claiming to be new versions of ancient remedies from Asia”. Linky. The FDA have revealed that these pills may contain high doses of an anti-obesity drug, sibutramine, (this is reminiscent of the red yeast rice used by some as an alternative to statins that, um, contains lovastatin – see here; also here) and the pills also contain a substance “linked to cancer” (phenolphthalein) as well as having unlisted ingredients. See, if you buy unregulated or poorly regulated medicines, whether conventional or alternative (but especially pills you buy over the internet) you don’t really know what you are getting.