learn Follistatin
Protein that blocks activin, a growth-regulating signal
- What is follistatin, and how does it influence hair follicle growth and regeneration? Follistatin blocks activin and related growth-inhibiting proteins, which mouse studies link to hair follicle development and cycling; the only verifiable human evidence is a single small 2011 phase 1 injection trial, so follistatin remains experimental and is not an approved hair-loss treatment.
- Can follistatin be applied to the skin, and does any form of it treat hair loss? No study shows that follistatin applied to the skin works, and no form of follistatin is an approved or proven hair-loss treatment. Follistatin injections, "research peptides" and gene therapies sold outside regulated trials are unapproved and of unknown safety.
- How does follistatin compare to finasteride or dutasteride for treating androgenic alopecia? Finasteride and dutasteride are prescription drugs with large controlled trials showing they lower DHT and slow androgenic hair loss, at the cost of documented hormonal side effects; follistatin targets a different, regenerative pathway but has only one small phase 1 human trial behind it, so it is experimental with unknown safety rather than a comparable alternative.
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