community Studies show: 0.2 mg reduces scalp DHT by ~55%. 1 mg reduces it by ~64%. 5 mg reduces it by ~69%.
Finasteride reduces scalp DHT significantly even at low doses, with 0.2 mg reducing it by about 55%, but higher doses like 1 mg and 5 mg offer only marginally more reduction. Users discuss side effects, with some experiencing none and others reporting issues like low libido, and they also mention using other treatments like minoxidil and dutasteride.