Herbal Supplements – Part Two, The Return
The following link is from Consumer Reports, a reputable independent testing agency. The article is about supplements in general, but it lists 12 supplements they feel are too dangerous to consider using. I think this is an excellent source of information about product safety, as Consumer Reports does not profit in any way from their publications and honesty.
Please remember that the dangers of supplements can often outweigh any minimal benefit you might get from them, so always talk to your physician about any that you may be taking.