I experienced improvement within 2-3 months with not missing one day! I normally don’t give reviews . I would have given this one WITHOUT an incentive because I believe in this formula. I’m 74 yrs young, active, energetic & vibrant. My thinking is clearer, I focus better. I can go into a room in my home & recall quickly, IF it slips my mind,,due to other thoughts I have before entering…it only takes 5 seconds & I recall. I’m happy my friend who’s been taking Advance Formula for probably 9-10 years or since it’s been on the market, highly recommended it to me. It’s been about 4 years for me. I order the package of 3. It’s more than worth it!