Hair regrowth shampoo for men is a type of shampoo that is specifically designed to help men regrow their hair. It typically contains ingredients that are known to promote hair growth, such as caffeine, biotin, and niacin.
One of the most popular hair regrowth shampoos for men is Rogaine. Rogaine is a prescription shampoo that contains the active ingredient minoxidil. Minoxidil is a vasodilator, which means that it helps to widen blood vessels. This increased blood flow to the scalp can help to promote hair growth.