Does GHK-Cu actually do anything for hair or is that marketing

The topical copper peptide literature on hair is mostly in vitro / follicle biology stuff + some small human studies for scalp health. It's not finasteride. For androgenic hair loss it's adjunct at best. Skin benefits (collagen, pigmentation, wound healing) have more consistent data.

Honest answer: if you want to keep your hair, minoxidil + finasteride (or dutasteride) + microneedling have the real evidence. GHK-Cu is a supporting actor, not the lead. Companies market it aggressively because it's not a controlled compound.

^ this. If someone tells you they "grew their hair back with GHK-Cu only" they're either lying, a unicorn, or also doing other things they're not mentioning.

Ok so short answer, not a miracle, useful for skin, mild adjunct for hair if anything. Got it.

I run GHK topically post-microneedling and subjectively it helps scalp inflammation and recovery. Not claiming regrowth. Just skin health.

That's a fair summary.

Iron, ferritin, and vitamin D pretty much always get overlooked in "hair loss" complaints. Pull labs before you blame genetics.

Also: scalp microneedling + minoxidil alone does more than most people realize. Before adding peptides, nail the basics.

Good call. Booked a lab panel. Will start with the basics before the fancy stuff.