I started taking this several months ago and felt great. My energy level was up, I was sassier, digestion was better. Then for several reasons I stopped taking it. Bad mistake. It seemed every body system from digestion to physical balance was whacked. Been back on it now for over a month and now feel perking, balance is better, digestion is better, outlook on life is brighter. At 80 and facing major changes I'm grateful for AMD and will never stop taking it again.