About The Peptide Advice
Who we are, what we cover, and why a site about peptides deliberately refuses to sell you any.
Almost everything written about peptides online is written by someone who sells them. Vendor blogs, clinic pages, affiliate sites paid by the vial — search almost any peptide question and every result on the first page has a commercial interest in the answer.
That is the gap this site exists to fill.
What we cover
Peptides in skincare. Copper peptides, Matrixyl, argireline, palmitoyl tripeptide-1 and the rest — what each one is, what the human evidence actually shows, and which are worth paying for.
Routines and layering. What genuinely conflicts, what merely irritates, and which famous “conflicts” are myths repeated until they sounded like facts.
Collagen. Dosing, forms, absorption, and an honest read of the human trials rather than the marketing.
Reading the label. How to decode an INCI list, what the number after a peptide name means, and how to spot a product where the active is present in name only.
Regulatory status. Where injectable peptides currently stand with the FDA, with compounding pharmacies, and with anti-doping bodies.
What we don’t do
We do not publish dosing protocols, reconstitution instructions, injection guidance or sourcing advice for peptides that are not approved drugs. Not because it wouldn’t get traffic — it would — but because that content directly enables harm, and because the FDA treats exactly that kind of page as evidence that a product is intended for human use.
Our regulatory-status section carries no affiliate links, no vendor names and no product recommendations at all. That is a permanent rule, not a current policy. Those pages are worth reading precisely because there is nothing behind them.
How we handle evidence
We cite primary literature and name the study type. When a finding comes from rodents or from a petri dish, we say so and we do not translate it into a human benefit. A great deal of peptide marketing rests on animal data presented as though it applied to people, and the difference is the whole story.
Where the honest answer is “nobody knows yet,” that is what you will read here.
Who writes this
Xi Li
Founder & Editor
Xi Li founded The Peptide Advice after years running consumer supplement brands across European markets, where the gap between what peptide products claim and what the research supports became impossible to ignore. He writes the site's ingredient and evidence coverage.