I started out taking the One A Day Teen for Her since I was only 16 at the time, and they worked for me, energy wise and my hair and nails grew at a fast pace. Then I started taking the Women's Formula about a year ago. In addition to the energy boost and feeling good all around, when I tell you guys that they made my hair grow, I mean it ! I'm an African American women and I cut my hair to go natural on September 1st of this year. You guys I'm telling you in as little as a MONTH I swear my hair grew at least a quarter of an inch. The hair is thicker and just looks healthy ! My hair grows super SUPER slow so this helps soooo much. Just an all-around great vitamin. I love them! I would recommend to any and everyone !