Copper Peptide Research Has a Route Problem: Why a Study of a Cream Cannot Vouch for a Vial, and How to Read the Claims Before You Believe Them

Search any peptide name and the first page of results will hand you a verdict. It works, it fails, it is a breakthrough, it is a scam. What the page rarely tells you is which kind of experiment produced the claim, and in peptide research that detail does more work than the peptide itself. Copper peptides are a clean test case. The best-known one, GHK-Cu, has been studied since the 1970s in dishes, in animals and in people, and those three bodies of evidence do not say the same thing. Telling them apart is a skill, and it is learnable. One molecule, three kinds of evidence Most of what gets called copper peptide research falls into three piles. The first is work on cells grown in plastic dishes, which is cheap and fast. The second is work on animals, usually rats, mice or rabbits, often in wound models. The third is work on people, which is slow, costly and, for this molecule, thin. Each pile answers a different question. A dish asks whether a compound can change what a cell does.

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