Sleep hormone. One small trial in 40 women and some uncontrolled studies suggest topical melatonin may affect the hair cycle, but evidence is weak.
Pyrilutamide (KX-826) is an investigational topical antiandrogen. It is not approved anywhere, and its trial results, including a failed 2023 Phase III and a positive 2026 one, are sponsor-reported and not peer-reviewed.
An androgen-receptor blocker approved only for acne (Winlevi 1% cream). A scalp solution is still investigational for hair loss; its sponsor reports positive Phase III results in men, not yet peer-reviewed.
Investigational antibody that blocks the prolactin receptor; tested in pattern hair loss, not approved, and no hair-loss results published.
a concentrate of your own blood platelets injected into the scalp; used off-label for hair loss, with mixed evidence