Plain-English glossary
Peptide
A peptide is a short chain of amino acids linked by peptide bonds, conventionally distinguished from a protein by its smaller size, often defined as fewer than about fifty residues. In research, peptides are studied as signaling molecules, enzyme substrates, and synthetic analogues; their specific amino acid sequence determines biological activity, while their small size makes them susceptible to enzymatic degradation.
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Names you may come across
BPC-157
A short synthetic peptide discussed in studies of tissue repair and the gut. Start with the study setting and its limitations.
GHK-Cu
A copper-binding peptide often discussed in skin research. An ingredient study is not evidence for every finished cosmetic.
Semax
A short synthetic peptide discussed in research on brain signalling and responses to stress or injury.
Selank
A synthetic peptide related to tuftsin, studied in research on stress-related and brain signalling.
MOTS-c
A small peptide encoded in mitochondrial DNA, studied in questions about energy regulation and metabolism.