My friend, who is not pregnant, swears by using prenatal vitamins. She says that it has the same ingredients as other vitamins, but at extra mgs, and a high amount of folic acid. Supposedly her hair has grown thicker and her nails are growing faster and are more firm. I've been thinking about trying it myself. Has anyone else had success with this? I just always thought prenatal vitamins were for pregnancy only, but it does make sense since they are just vitamins.