How are dietary supplements that contain dangerous and banned substances sold legally in the United States and other countries?
Unfortunately, many products being sold legally in the marketplace contain illegal ingredients or are adulterated. The sheer volume of problematic substances makes regulating them difficult for authorities. The U.S. Food & Drug Administration (FDA), for instance, needs to demonstrate that something qualifies as illegal and then ban it, but by that time the unscrupulous manufacturers have often moved on to some other product. The current penalties are simply not strong enough, especially on second and third offenses, to dissuade some companies from putting out problematic products. Fines are usually less than $250,000 for selling an adulterated product but profit potential is well into the millions.