Is is safe to assume that vellus hairs turn into normal hairs on finasteride?
Vellus hairs stay as vellus hairs. In every follicular unit, there are one or two vellus hairs (short like stunted hairs). Miniaturized hairs, on the other hand, are terminal hairs (normal hairs) that lost their bulk and these are the hairs that get positively impacted from finasteride by increasing their shaft thickness when they are miniaturized.