Why Are Research Peptides Not Sold as Dietary Supplements?

The Dietary Supplement Health and Education Act of 1994 (DSHEA) defines what can be sold as a dietary supplement in the United States. Most research peptides do not meet this definition, and that is the primary reason they are sold under a research-use-only label rather than as supplements.

What does DSHEA require?

DSHEA requires that a dietary ingredient either (a) was marketed in the United States as a dietary supplement before October 15, 1994, or (b) has been submitted to the FDA as a New Dietary Ingredient (NDI) with evidence of a reasonable expectation of safety. Products that meet neither criterion cannot be sold as dietary supplements.

Why do most peptides fail this test?

Synthetic research peptides like BPC-157, Thymosin Beta-4, or CJC-1295 were not marketed as dietary supplements before 1994. They were synthesized in research laboratories and entered commerce through the research materials market, not the supplement market. No NDI notifications have been submitted for them to the FDA.

What about amino acids?

Individual amino acids such as L-glutamine, L-arginine, or creatine were marketed as supplements before 1994 and meet the DSHEA definition. But a synthetic peptide is not the same as its constituent amino acids. The fact that a peptide is made of amino acids does not make it a dietary ingredient.

What are the consequences of selling a peptide as a supplement?

Selling a non-qualifying substance as a dietary supplement is a violation of the Federal Food, Drug, and Cosmetic Act. The FDA has issued warning letters to companies making supplement claims about peptides.

Frequently asked questions

Could a peptide become a supplement in the future?

In principle, yes, if an NDI notification were submitted and accepted by the FDA. In practice, the safety evidence requirements and the regulatory cost make this unlikely for most research peptides.

Are collagen peptides different?

Yes. Collagen hydrolysates are derived from food-grade animal collagen and have a long history of use in food. They are generally recognized as safe (GRAS) and are sold as supplements. They are structurally unrelated to the synthetic research peptides discussed here.