Used topically in hair growth treatments, minoxidil sulphate is the active metabolite responsible for promoting hair regrowth in individuals with androgenetic alopecia. It works by prolonging the anagen (growth) phase of hair follicles and increasing blood flow to the scalp, which enhances nutrient delivery to hair roots. Due to its potent vasodilatory effects, it stimulates dormant follicles to produce new hair strands, leading to increased hair density and thickness over time. It is commonly found in formulations designed to treat male and female pattern baldness.