PeptideOverhyped
Acetyl Tetrapeptide-17
Medically reviewed by ChokChok · Updated April 15, 2026
The peptide you'll find in every "non-prostaglandin" lash serum on the market.
What It Does
Stimulates lash/brow growthSoothes
Deep Dive
After prostaglandin analogs (the bimatoprost family in RevitaLash, Latisse) got criticised for side effects like iris discoloration, the cosmetic industry pivoted to peptide-based lash serums. Acetyl tetrapeptide-17 is the most common — claimed to stimulate keratin-family proteins in hair follicles. Clinical evidence is thin but user reports are generally positive for modest lash/brow density improvement over 8–12 weeks.
Best For
Mature
Pairs Well With
Effective Concentration
0.1–1% in lash/brow serums.