Every peptide, explained from the beginning.
Peptide Lexicon is a reference library of individual peptides, written for readers with no background in the subject. Each entry states what the compound is, what it is commonly said to be good for, what the published research actually shows, and where the compound stands with regulators. Entries report what studies, labels and regulators say, and attribute and date every claim; they never instruct a reader to use anything. The library does not rank vendors, does not publish best-of roundups, and does not sell anything.
Written for the first time you read it
Every term is explained where it appears. No assumed background, no jargon left standing.
Rats and people are never the same sentence
Each entry says plainly how much of the evidence is human, and how much is not.
Every compound, kept current
The library is checked weekly against the full compound roster, and every entry carries the date it was last reviewed.
Latest
5 articles
What Are Peptides? A Plain Explanation, and What They Actually Do
A peptide is a short chain of amino acids. What that means, how peptides differ from proteins and from drugs, which ones are approved medicines, and how to read a claim about one.
Updated 2026-09-06
Tesamorelin: An Approved Drug for One Narrow Use, and What It Is Not For
Tesamorelin is FDA-approved as EGRIFTA for reducing excess abdominal fat in HIV patients with lipodystrophy. What the label says, what it explicitly does not cover, and why that distinction matters.
Updated 2026-09-06
TB-500 Is Not Thymosin Beta-4: What It Actually Is, and What the Research Shows
TB-500 is Ac-LKKTETQ, a seven-amino-acid fragment of the 43-amino-acid protein thymosin beta-4. Why the two are constantly conflated, what that changes, and what the evidence covers.
Updated 2026-09-06
PT-141 (Bremelanotide): Approved as Vyleesi, and What the Approval Covers
PT-141 is bremelanotide, approved in the US in 2019 as Vyleesi for one specific use in premenopausal women. What the label covers, its stated limitations, and its documented warnings.
Updated 2026-09-06
BPC-157: What It Is, What It Is Said to Be Good For, and What the Research Shows
BPC-157 is a 15-amino-acid peptide from a gastric protein fragment. The healing claims, where they come from, why almost all of them are rodent studies, and its current FDA compounding status.
Updated 2026-09-06