Regaine extra strength for men triple pack is clinically proven to treat hereditary hair loss 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 believed 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 resu