Dietary supplement

A dietary supplement is a legally defined product meant to be swallowed, labeled as a supplement, and made with a dietary ingredient such as a vitamin, mineral, botanical, amino acid, or qualifying dietary substance. Under DSHEA, that category does not automatically include most research peptides just because peptides are chains of amino acids.

What makes a product a dietary supplement under DSHEA?

DSHEA makes both the ingredient and the finished product matter. The product must supplement the diet, be ingested, carry supplement labeling, and contain a qualifying dietary ingredient. FDA’s current dietary-supplement explanation expressly lists amino acids. That wording creates a lane for amino-acid products, but it does not say that every molecule assembled from amino acids belongs there.

FDA does not approve supplements before sale as safe and effective drugs. That lighter premarket system applies only after the product qualifies for the category; putting “Supplement Facts” on an ineligible ingredient is not a regulatory costume change.

Why is creatine sold as a supplement while BPC-157 is not?

Creatine fits the supplement market because it is swallowed to add a dietary substance already obtained from foods, and NIH treats creatine as a well-studied performance-supplement ingredient. BPC-157 is a synthetic 15-amino-acid peptide promoted for drug-like effects, not an amino acid added to the diet. A chain does not inherit each link’s legal category.

So, are peptides supplements? Some food-derived peptide ingredients may qualify on their own facts, but “peptide” is not a blanket DSHEA category. FDA’s March 2026 scope meeting gathered input on newer ingredient types; it did not announce that research peptides had become dietary ingredients. Typical injectable vials instead appear as research-use-only products, meaning lab chemicals rather than supplements for ingestion.

What is the drug exclusion clause?

The drug exclusion clause keeps certain drug articles out of the dietary supplement definition. An ingredient generally cannot enter through the supplement door after approval as a new drug or after substantial, public clinical investigation under an effective investigational new drug application. The exception is evidence that the article was marketed as food or a dietary supplement first.

Timing therefore matters alongside chemistry. DSHEA status is not a consolation prize for an unapproved drug candidate, and an FDA regulatory status question cannot be answered from the number of amino acids in a molecule.