About What Peptides

Updated 2026-09-14

What Peptides is an independent education site about one subject: peptides, their chemistry, their appearance on labels, and the paperwork that accompanies them. The site exists because the same molecule shows up in three very different places — a moisturizer aisle, a research supplier's catalogue, a nutrition supplement panel — and almost nobody explains the three dialects to each other.

The site is organised as five pillar guides: peptide science, skin peptides, peptide guides, vendor reviews and peptide wellness. Each pillar summarises its subject and routes into detailed pages that go deep on one term, one label or one calculation.

What we publish

Structure and nomenclature explained with real numbers: bond geometry, residue-count conventions, mass and concentration arithmetic. Cosmetic label literacy: INCI order, listing thresholds, what a position in the ingredient list does and does not imply. Documentation literacy: what a certificate of analysis lists and what a gap in it means. Comparison tables throughout.

How the numbers are produced

Figures are traced to public references — PubChem, NCBI Bookshelf, UniProt, the Protein Data Bank, FDA labelling guidance, the European Commission's CosIng database and peer-reviewed literature. Where a number is an industry convention rather than a measured value, for example a storage temperature band, we say so explicitly. Where two sources disagree, we say that too.

What we do not do

We sell no peptides and accept no payment for placement. We give no medical advice, no dosing protocols, and no instructions for preparing or administering anything to a person or an animal. We make no therapeutic or outcome claims. We do not endorse, rank or recommend any vendor, and we have not independently tested any commercial product: our vendor material explains what you can check in public documents. See the disclaimer.

Corrections

If a figure, a name or an interpretation is wrong, tell us through the contact page and cite the source. Accepted corrections are dated and noted on the page itself.