Epithalon (epitalon, AEDG): the Ala-Glu-Asp-Gly tetrapeptide, its origin in the epithalamin research program, and what documentation establishes a laboratory research lot.

MOTS-c explained: the 16-amino-acid peptide encoded in the mitochondrial 12S rRNA gene, its 2015 identification, and what documentation establishes a laboratory research lot.

GHK-Cu explained: the copper(II) complex of glycyl-L-histidyl-L-lysine, how it differs from free GHK, its research history since 1973, and what documentation matters for research materials.