You do not need to memorize a hundred compounds — you need the map. Researchers group peptides by the biological systems their study focuses on:
| Family | What the research explores | Often-discussed examples |
|---|---|---|
| Metabolic / GLP | energy, metabolism, and glucose-signaling pathways | GLP-1, MOTS-c, AOD-9604 |
| Healing & recovery | tissue and gastrointestinal research models | BPC-157, TB-500, KPV |
| GH secretagogues | the growth-hormone signaling axis | CJC-1295, Ipamorelin, Sermorelin |
| Cosmetic & skin | skin, collagen, and pigment research | GHK-Cu, AHK-Cu, Melanotan |
| Longevity & cellular | aging and mitochondrial pathways | Epitalon, NAD+, SS-31 |
| Cognitive & neuro | neurological and behavioral research | Semax, Selank, DSIP |
| Sexual health | melanocortin-pathway research | PT-141 |
When you meet a new name, your first question is simply: which family? That single answer tells you roughly what kind of research it belongs to and what conversations surround it. A new compound stops being intimidating the moment you can place it.
The boundaries are useful, not rigid — some compounds are studied across more than one family, and some research blends families deliberately. The map is a starting point, not a rulebook.
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