Here is a great example about why you should be choosy about what supplement company you trust. Luckily in this case nobody was hurt, just a false claim.
The Federal Trade Commission, the nation’s consumer protection agency,
charged NBTY with making false and unproven claims that its
multivitamins — which featured Disney and Marvel Heroes characters —
promoted healthy brain and eye development in children. According to
the FTC, the vitamins’ packaging and print ads touted the amount of DHA
as significant, but the multivitamins contained only a trace amount of
DHA (0.1 mg). The FTC also alleged that the company’s claims about the
brain and eye health benefits of its multivitamins were not supported
by scientific evidence.
If you bought these vitamins you may qualify for a refund.