Comment Re:you can thank Patron Saint Orrin Hatch for this (Score 4, Informative) 713
It's called the Dietary Supplement Health and Education Act of 1994, or DSHEA. You can search for that on Google or Wikipedia. It's harder to find info linking Hatch to the law, but if you search for DSHEA and Hatch together, you'll find it.
Heavy lobbying by Congress and the makers of these drugs caused Clinton to sign the bill into law.