What is the mechanism of action for Rogaine in treating hair loss?

Rogaine, generically known as minoxidil, is a topical medication used to treat hair loss. Its exact mechanism of action in promoting hair growth is not completely understood but is believed to involve the dilatation of blood vessels in the scalp. This vasodilation effect increases blood flow, oxygen, and nutrients to hair follicles, which can reinvigorate shrunken hair follicles, increase their size, and prolong their growth phase. Additionally, minoxidil extends the anagen phase (the active growth phase of hair follicles) and can help to reverse the miniaturization of hair follicles, which is a hallmark of androgenetic alopecia (commonly known as male or female pattern baldness). Consequently, this helps to promote the regrowth of thicker, longer, and more pigmented hair strands.