Minoxidil is the only topical product proven to stop hair loss and regrow hair. Clinical research shows that increasing the concentration of Minoxidil / Rogaine from 2% to 5% will improve the response of hair growth in quantity, while simultaneously decreasing the length of time for successful results. Finasteride has also been shown to stop hair loss and regrow hair in men. This product combines the best of both products in a topical format and can only be used by men.