Hair Growth Articles

GHK-Cu and AHK-Cu are the two copper peptides used in hair care, and they are not interchangeable. What each one is studied for, the key differences, and why combined formulatio...

Three device types, one variable that actually has trial evidence behind it. Which at-home microneedling device suits you — and what none of them has been proven to do.

Microneedling does regrow hair — but the evidence is strongest alongside a topical, not on its own. Depth, frequency, what to pair it with, and a realistic 12-week timeline.

For scalp use a derma stamp beats a derma roller on depth control and safety — but the landmark clinical trial used a roller. We compare needle entry angle, depth and the actual...

After testing 8 leading copper peptide hair growth serums on concentration, clinical evidence, delivery method, and value, Hairgenetix is our Summer 2026 pick — the highest conc...

Key Findings at a Glance A topical spray combining GHK peptide with 5-aminolevulinic acid (5-ALA) produced 52–72 extra hairs per cm² in 6 months — while the placebo group g...

Key Findings at a Glance GHK-Cu is a naturally occurring human peptide that influences 31.2% of all human genes — resetting gene expression toward a healthier, younger sta...