Our daughter is 16 and I purchased these vitamins because she doesn't get enough nutrients through out the day. She wasn't getting enough sleep, and her eating habits were so bad that when I happen to run across these I just had to give them a try. All though it's only been three weeks she said she is sleeping better and feels more rested. This to me says something is working with these vitamins so I am giving these vitamins a five star and will continue to order them. I would definitely recommend these vitamins to family and friends and have decided to order for me as well because as a mom of 4 and a nana we need the best nutrition as we carry on our day too.