PEPTIDE NERD · CATALOG
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Every formula states the concentration of the active on the front of the bottle, and prints the full ingredient list on the back. No hidden percentages.
How to read any copper peptide label
01 — FIND THE NUMBER
If a serum will not tell you the GHK-Cu percentage at all, that is your answer. Ours is on the front of the bottle.
02 — ASK WHAT IT IS A PERCENTAGE OF
Percentage of pure peptide, or percentage of a pre-made solution? The two differ by a factor of 100.
03 — CHECK THE INCI LIST
Ingredients are listed by concentration. Ours sits 5th of 14 — ahead of the preservative, not buried at the end.