Rogaine Men's & Women's 5 % Minoxidil FoamDetails Rogaine contains minoxidil, which revitalizes hair follicles, likely causing them to shift from a dormant phase to an active growing phase. Scientists believe that minoxidil works by aiding the blood flow to the hair follicles in your scalp, thereby helping hair regrowth. Features Men's Rogaine Hair Regrowth Treatment 5% Minoxidil Foam, Six Month Supply. As we age, hair follicles begin to shrink, leading to thinning hair (or loss of hair