Losing your hair is more common in men than women, and can occur due to genetics, hormonal changes, medical conditions, or even just as part of the regular aging process. The great thing, however, is that there are no shortage of hair products out there to help you hold onto the hair you do have, and encourage new hair growth. As healthy hair starts in the shower with the right shampoo, we've rounded up a few of our favorites to stimulate and strengthen your strands.