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Complementary and Alternative Medicine

Complementary and Alternative Medicine


The Definition of "Dietary Supplement"

The law defines dietary supplements in part as products taken by mouth that contain a "dietary ingredient." Dietary ingredients include vitamins, minerals, amino acids, and herbs or botanicals, as well as other substances that can be used to supplement the diet.


What's Included?

Dietary supplements come in many forms, including tablets, capsules, powders, energy bars, and liquids. These products are available in stores throughout the United States, as well as on the Internet. They are labeled as dietary supplements and include the following, in addition to other items:

  • vitamin and mineral products
  • "botanical" or herbal products—These come in many forms and may include plant materials, algae, macroscopic fungi, or a combination of these materials.
  • amino acid products—Amino acids are known as the building blocks of proteins and play a role in metabolism.
  • enzyme supplements—Enzymes are complex proteins that speed up biochemical reactions.


Source:  . Consumer Updates - FDA 101: Dietary Supplements [WebContent]. Retrieved from


Learn More: Dietary Supplements

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