Source: FDA U.S Food and Drug Administration
How Vitamins are Regulated
Vitamin products are regulated by FDA as "Dietary Supplements." The law defines
dietary supplements, in part, as products taken by mouth that contain a "dietary
ingredient" intended to supplement the diet.
Listed in the "dietary ingredient" category are not only vitamins, but minerals,
botanicals products, amino acids, and substances such as enzymes, microbial
probiotics, and metabolites. Dietary supplements can also be extracts or
concentrates, and may be found in many forms. The Dietary Supplement Health and
Education Act of 1994 requires that all such products be labeled as dietary
In June 2007, FDA established dietary supplement "current Good Manufacturing
Practice" (cGMP) regulations requiring that manufacturers evaluate their
products through testing identity, purity, strength, and composition.