A year after taking these, and talking so greatly about them, my dad insisted that he had to start taking these life changing vitamins. He took them for two weeks and decided to stop. When I found out and asked him why, he told me, “these don’t work, I don’t notice anything different about me from taking them.” I laughed in response and explained how for me it took months before I noticed their positive effects on me. And that the effects they DO have, take place GRADUALLY over religiously taking them for an extended period of time.