Rogaine® Topical Solution (minoxidil 2%) works in part by prolonging the growth of hair, which grows in cycles. Dermatologists conducted 12-month clinical tests. After 4 months, 26% of patients using Rogaine reported moderate to dense hair regrowth, compared with 11% of those using a placebo (a similar solution without minoxidil-the active ingredient in Rogaine).
eBay