Peptides,
explained.

Look up a peptide’s structure, research, and evidence.

A simple dipeptide. Two amino acids joined by a peptide bond. R₁ and R₂ stand for their side chains.

Peptide reference

Metabolism & appetite

C₁₈₇H₂₉₁N₄₅O₅₉

Large randomized human trials

Tissue repair

C₆₂H₉₈N₁₆O₂₂

Mainly animal and laboratory evidence

Anxiety research

C₃₃H₅₇N₁₁O₉

Small human studies and animal research

Brain-injury research

C₃₇H₅₁N₉O₁₀S

Animal research; limited clinical evidence

Sexual-desire disorders

C₅₀H₆₈N₁₄O₁₀

Human trials for a specific indication

Childbirth physiology

C₄₃H₆₆N₁₂O₁₂S₂

Established prescription obstetric uses

A peptide is a chain of amino acids linked by peptide bonds. Changing the sequence or structure can change how it behaves.

A result in cells or animals is different from a result in people. Each profile names the kind of research behind the claim.