Final answer:
The FDA does not routinely analyze the content of dietary supplements. Instead, the agency relies on manufacturers to comply with Good Manufacturing Standards, reacting to issues after products have reached the market or when hazards are reported.
Step-by-step explanation:
The Food and Drug Administration (FDA) regulates dietary supplements, but it does not treat them in the same manner as pharmaceuticals. The agency relies on manufacturers to ensure their supplements meet Good Manufacturing Standards, and it does not systematically require pre-market testing or approval of the content of dietary supplements. However, if a dietary supplement is found to be hazardous, the FDA has the authority to take enforcement action and remove it from the market.
Manufacturers of dietary supplements can make certain health claims regarding their products, but they must include a disclaimer stating that their claims have not been evaluated by the FDA and that the products are not intended to "diagnose, treat, cure, or prevent any disease." This indicates a more reactive than proactive regulatory model, acting only when a concrete issue arises, like the health problems reported to be associated with certain supplements.
Controversies have arisen regarding the mislabeling of dietary supplements and the presence of unlisted ingredients, some of which may be harmful. Despite this, the responsibility for safety lies predominantly with the manufacturers and not with routine analysis by the FDA. Major issues such as mislabeling or incorrect health claims, once identified, could lead to repercussions from the FDA, but these are often addressed after products have reached the market.