AHK-Cu and GHK-Cu look almost identical on paper — three amino acids, one copper ion, vivid blue color. But swap a single amino acid and you get a peptide researchers point in a different direction: hair.
Cousins, not twins
GHK-Cu is glycine-histidine-lysine + copper. AHK-Cu swaps glycine for alanine at the first position (alanine-histidine-lysine + copper), becoming Copper Tripeptide-3. That small change preserves the copper-binding histidine-lysine motif while giving the molecule its own research path.
GHK-Cu: the skincare legend
With roughly 200 published studies, GHK-Cu is the benchmark cosmetic peptide — studied for decades in connection with collagen, firmness, and the appearance of fine lines. Its home turf is skin.
AHK-Cu: the hair-focused newcomer
AHK-Cu’s research story is newer and narrower: laboratory studies focused on hair biology, including dermal papilla cell activity — the cells at the base of the follicle that help drive the hair cycle. Suppliers describe mechanisms involving VEGF signaling, antioxidant (SOD) activity, and DHT-related oxidative stress pathways. The honest caveat: this is early-stage, cell-level research — no clinical trials yet. It’s promising, not proven.
Why we chose AHK-Cu
We make a hair mask, not a face serum — so we formulated around the copper peptide whose research points at hair. That’s the entire logic of the RootMira formula.
Try it: The RootMira AHKCU Copper Peptide Hair Mask pairs AHK-Cu with shea butter, coconut oil, rosemary, and aloe for dry, frizz-prone hair.
RootMira products are cosmetics, not medicines. This article shares general ingredient information, not medical advice.