A clearer way to understand peptides.
Editorial team · Editorial team
Peptide Atlas guides are researched and drafted with AI assistance from primary sources: peer-reviewed studies, trial registries, regulator documents, and product labels. Each source is opened and checked against the claim it supports before publication, and every guide shows when it was last checked. No guide on this site has had an individual expert or medical review unless the page names that reviewer.
27 items
BPC-157 and TB-500 are often sold together but are unrelated molecules. How their origins, study models, trial records and open questions differ.
CJC-1295 and ipamorelin act on different receptors and have separate, small human records. How their chemistry, study models and open questions differ.
Semaglutide acts on one receptor, tirzepatide on two. How their molecules, major trials, head-to-head studies and US label warnings compare.
What FDA approval covers, how 503A and 503B compounding differ, what changed after the GLP-1 shortages, and why a committee vote is not approval.
Most BPC-157 research is in rats and cells. What those studies measured, what the few small human reports show, and its US status as of November 2026.
Two different growth hormone-related peptides, often sold as a pair. What small human studies measured for each, and what has never been tested.
How to read a collagen label: the Supplement Facts panel, source animal, "types I and III", marketing claims, and testing marks.
Source, amount, and the outcome that was actually measured: the questions that matter before price.
Why we do not name a best collagen powder, and the criteria that decide which one fits a particular reader.
What GHK-Cu is, which skin claims have been tested in people, which rest on cell and animal work, and how to read a copper peptide claim.
How US rules treat peptide cosmetics, prescription drugs, dietary supplements and research-use materials, and why intended use decides the category.
GHK-Cu is sold as a cosmetic ingredient and promoted in injectable preparations. Evidence, safety data and legal status differ by form and route.
Neutral checks for a supplier's web address: registration data, certificate details, state business records, and whether documents match the domain.
Cells, animals or people; which form and route; what was measured; who paid. The questions to ask before a study result means anything to you.
Our reviews check what makers publish and what we could confirm, criterion by criterion. No sample testing, no star scores, no paid rankings.
MOTS-c is a peptide encoded in mitochondrial DNA. Studies of it given as a treatment are in mice and cells; human data so far measure the body's own levels.
How to compare peptide serums by INCI names, stated concentrations, base formula and packaging, and what a brand's own study can and cannot show.
Identity asks what the substance is, purity what else is present, quantity how much is there. Why one lab number cannot answer all three.
TB-500 is usually a seven-amino-acid fragment, not the 43-amino-acid protein thymosin beta-4. Why the difference matters when reading research.
A documentation review of the label, product page and policies of The Ordinary's copper peptide serum. We did not analyze a product sample.
A “tested” label can mean one lab report or a certification program with audits and a registry. What each covers, and how to check the claim.
Three unflavored collagen powders compared on source, grams per serving, price per gram, certification and returns, from public labels and policies.
A field-by-field walk through two real ClinicalTrials.gov records: status, phase, design, enrollment, outcomes, sponsor, dates and posted results.
A documentation review of the label, product page, certification listing and policies. We did not analyze a product sample.
A certificate of analysis reports specific tests on one batch. How to read what it covers, who issued it, and what a purity number leaves out.
The same word covers skincare ingredients, prescription medicines, supplements and research materials. The category decides which evidence applies.
Being sold online says nothing about FDA review. How cosmetics, supplements and research-use labels differ, and which public FDA records to check.