Dietary Supplements DatabaseThis is a very cool site:
* dietarysupplements.nlm.nih.gov/dietary/
You can look up supplements in the large database
by ingredient, and for each supplement there will
be links to fact sheets for its ingredients, for
those cases in which fact sheets have been prepared.
For example, you can look up the supplements that
contain "bovine pituitary", but you won't find a
fact sheet for that.