Regaine extra strength for men is medically proven to treat hereditary thinning hair and advancing baldness in men aged 18 65 years regaine for men contains 5 concentration of the active ingredient minoxidil who does regaine work for it is thought that it works by aiding the blood flow to the cells in your scalp which grow hair the exact process by which that occurs is not fully known regaine extra strength is specifically designed for men who want fast results regaine works for 4 o