Amazing, the first week I took it my hair just exploded with growth it was almost freaky. Now after about a year of use I can say this is the best multivitamin on the market. It's energizing, makes your skin look fantastic, has eliminated my constant anemia, intensly helped with my ibs symptoms, and strengthened my hair and nails. I would advise that first time users start off at one pill a day as your body needs to metabolize the vitamins and it takes sometime which will occur in headache because of the green tea extract. Also if you happen to be low on b-12 you can become a bit itchy the first week. But these side effects go away within a week and the benefit far outweigh the side effects