Those messages come from the "health supplement" industry, which is basically a segment of the health industry that the FDA is prohibited by law from regulating

Those messages come from the "health supplement" industry, which is basically a segment of the health industry that the FDA is prohibited by law from regulating. And it entirely feeds on consumer cynicism towards the health industry, despite the fact that the major players in "health supplements" are guilty of everything the health industry is accused of being.