Skip to content
My WebMD Sign In, Sign Up
Font Size
A
A
A

FDA 101: Dietary Supplements

How Are Supplements Regulated?

You should know the following if you are considering using a dietary supplement.

  • Federal law requires that every dietary supplement be labeled as such, either with the term "dietary supplement" or with a term that substitutes a description of the product's dietary ingredient(s) for the word "dietary" (e.g., "herbal supplement" or "calcium supplement").
  • Federal law does not require dietary supplements to be proven safe to FDA's satisfaction before they are marketed.
  • For most claims made in the labeling of dietary supplements, the law does not require the manufacturer or seller to prove to FDA's satisfaction that the claim is accurate or truthful before it appears on the product.
  • In general, FDA's role with a dietary supplement product begins after the product enters the marketplace. That is usually the agency's first opportunity to take action against a product that presents a significant or unreasonable risk of illness or injury, or that is otherwise adulterated or misbranded.
  • Dietary supplement advertising, including ads broadcast on radio and television, falls under the jurisdiction of the Federal Trade Commission.
  • Once a dietary supplement is on the market, FDA has certain safety monitoring responsibilities. These include monitoring mandatory reporting of serious adverse events by dietary supplement firms and voluntary adverse event reporting by consumers and health care professionals. As its resources permit, FDA also reviews product labels and other product information, such as package inserts, accompanying literature, and Internet promotion.
  • Dietary supplement firms must report to FDA any serious adverse events that are reported to them by consumers or health care professionals.
  • Dietary supplement manufacturers do not have to get the agency's approval before producing or selling these products.
  • It is not legal to market a dietary supplement product as a treatment or cure for a specific disease, or to alleviate the symptoms of a disease.
  • There are limitations to FDA oversight of claims in dietary supplement labeling. For example, FDA reviews substantiation for claims as resources permit.

 

Are Supplements Safe?

Many dietary supplements have clean safety histories. For example, millions of Americans responsibly consume multi-vitamins and experience no ill effects.

Some dietary supplements have been shown to be beneficial for certain health conditions. For example, the use of folic acid supplements by women of childbearing age who may become pregnant reduces the risk of some birth defects.

Another example is the crystalline form of vitamin B12, which is beneficial in people over age 50 who often have a reduced ability to absorb naturally occurring vitamin B12. But further study is needed for some other dietary supplements.

Some supplements have had to be recalled because of proven or potential harmful effects. Reasons for these recalls include

  • microbiological, pesticide, and heavy metal contamination
  • absence of a dietary ingredient claimed to be in the product
  • the presence of more or less than the amount of the dietary ingredient claimed on the label

In addition, unscrupulous manufacturers have tried to sell bogus products that should not be on the market at all.
Before taking a dietary supplement, make sure that the supplement is safe for you and appropriate for the intended purpose.

WebMD Public Information from the FDA