You know, I took six bottles for six month ,,took five months off and now I’m starting my second round of six bottles as I completed one bottle yesterday,,,you know I have Executive function issues just based on the fact of my ability to have focus and concentration in an efficient way. I don’t know if it can be attributed to your advanced memory formula, if you ask me, that’s a step in the right direction,, but so you know, I am doubling up .., ,,so I’m taking four pills every day and I have no adverse side effects or stomach issues as you’re advanced Memory formula is very easy on my stomach. I’m doing my best with your advanced memory formula,!! merry Christmas and happy holidays and happy new year!!