Regaine extra strength for men 1 month supply is a multipack designed for men with hereditary hair loss aged 18 to 65 it has been scientifically proven to help stop hereditary hair lossr how does it workr regaine revives shrunken hair follicles so that they increase in size and are able to regrow thicker hair over time it does this by increasing the supply of blood and nutrients to the hair follicles strengthening existing hair and stimulating secondary growth this produces thicker long