The $20 billion weight-loss and diet-supplement industry is the target of a new government review that found that about a fifth of all supplements sold had labels that misrepresented their health benefits. Most of the products do not have to undergo a Food and Drug Administration scientific review of their health claims before being released on the market, and some of those reviewed in the report released on Wednesday went so far as to make the illegal claim that they could prevent HIV or cure cancer.
