Copper peptides
GHK-Cu, evidence levels and the limits of a headline.
Explore the guide ↗Understand what is in the bottle.
Copper complexes, conventional peptides, caffeine and botanical blends. Learn the distinctions behind the ingredient names.
Beyond copper
Why a multi-peptide blend is a different purchase question.
Explore the guide ↗Read the blend
Make sense of Redensyl, Capixyl and Procapil.
Explore the guide ↗7 guides found
Ingredients01
GHK-Cu vs AHK-Cu: reading copper-peptide labels
Similar-looking abbreviations do not make two formulas interchangeable.
Read the guide
Ingredients02
Multi-peptide vs copper-peptide hair serum
How to tell whether a bottle contains the ingredient you actually meant to buy.
Read the guideIngredients03
Does The Ordinary hair serum contain copper peptides?
The hair-density serum and the copper-peptide facial serum are easy to confuse.
Read the guideIngredients04
Do higher peptide percentages mean better hair results?
Why a percentage on the front of a bottle is only the start of the comparison.
Read the guideIngredients05
Redensyl, Capixyl and Procapil: what the names mean
A shopper’s guide to trade blends used in scalp serums.
Read the guide
Ingredients06
Caffeine vs peptides in scalp serums
How to compare two overlapping ingredient approaches without assuming a treatment winner.
Read the guide
Ingredients07
Essential oils in scalp serums: what to look for
Scent, sensation and efficacy are separate questions.
Read the guide