What peptides do.
What each compound is, what it does, and how strong the evidence behind it is. For information and research purposes only.
How we grade the evidence
Popularity is not proof. These grades are applied consistently across the whole library.
Approved by the FDA for at least one indication. Extensive human safety data.
Published human clinical trials exist, but no FDA approval for the relevant use.
Regulatory approval in other countries but not in the US.
Animal or in-vitro studies only. Promising but unproven in humans.
User reports and practitioner experience only. No controlled studies.
Browse the library
20 compounds
Semaglutide
Girl. A GLP-1 receptor agonist, in English: it walks straight up to your appetite and turns the volume do…
Tirzepatide
This one doesn't stop at one receptor. It's a dual GIP/GLP-1 agonist, both pathways firing together, for…
Liraglutide
Same GLP-1 family as semaglutide, just first out the door. The half-life is shorter, so this one wants a…
Retatrutide
This is the one that went for three: GLP-1, GIP, and glucagon receptor, all three pathways firing at once…
Tesamorelin
A GHRH analog, meaning it doesn't hand your pituitary growth hormone directly. It just tells your pituita…
Bremelanotide
This one works your brain, not your blood vessels: a melanocortin-4 receptor agonist acting straight on t…
Testosterone (TRT)
Let's be clear about what this is: a steroid hormone, not a peptide, even though it lives in every peptid…
Sermorelin
A GHRH analog, just the first 29 residues of the real thing, and that is apparently all your pituitary ne…
BPC-157
Pulled from gastric juice protein, of all places. The proposed mechanisms read like a repair crew: growth…
TB-500
A lab-made fragment of thymosin beta-4, and its whole job is getting cells to move where they need to go.…
GHK-Cu
A tripeptide with copper riding along, occurring naturally in your own body, and it's already doing colla…
CJC-1295
A GHRH analog with an upgrade bolted on: Drug Affinity Complex, DAC for short, stretching the half-life o…
Ipamorelin
This one is selective, and that word is doing real work. It hits the ghrelin receptor, GHS-R1a specifical…
MK-677
Technically, this is not even a peptide, it just runs with that crowd. A non-peptide ghrelin receptor ago…
Melanotan II
This one does not pick a lane: a non-selective melanocortin receptor agonist, lighting up MC1R for pigmen…
Thymosin Alpha-1
A thymic peptide doing exactly what the thymus does: training up your T-cells, waking up dendritic cells,…
Epitalon
Four amino acids, Ala-Glu-Asp-Gly, that's the entire compound, and Khavinson's whole claim is that it can…
MOTS-c
Sixteen amino acids, encoded right inside your mitochondria's own DNA, in the 12S rRNA region, talking st…
Selank
A lab-built version of a tuftsin fragment, that little piece of immunoglobulin G, going to work on seroto…
Semax
A synthetic analog of ACTH(4-10), and it does more than that short name suggests: BDNF up, NGF up, dopami…
Nothing matches all of those.