I've been taking it for at least 6 years now. In the beginning, after about a year, I decided to stop taking it to see if I noticed a difference & boy, did I! When I gave it to my healer/chiropractor to check out he looked at the ingredients & said 'brain nutrients', why not? I also take EGCG, concentrated green tea extract, but Memory Formula is my go to. I would (and do) recommend it to anyone. I'm 80 now, so there's that!