WHAT IT IS Hair Regrowth Treatment for Men Minoxidil Topical Solution 5 is for men who have a general thinning of hair on the top of the scalp. WHAT IT DOES Bosley Pro Hair Regrowth Treatment for Men is not intended for frontal baldness or receding hairline. Has been shown to regrow hair in men with varying degrees of thinning or hair loss and is FDA approved.