Peptide-Powered Serum Could Help Thicken Thinning Hair

Dermatologists say certain peptides can support the hair growth cycle by improving scalp health and blood flow; The Ordinary's multi-peptide serum—fragrance- and sulfate-free, easy to use, and under $25—has strong user reviews for reducing shedding and encouraging new growth, though experts caution it's complementary rather than a miracle and works best with treatments like PRP for more advanced hair loss.