I started using Cal-Mag C again after my friend told me it can help diminish afibulation. I plan to surprise the doctor with an improvement he can't explain! I am drinking two glasses a day -- one in the morning when I first wake up and one at night before bed. I like the taste. I know I am doing something good for my body. Today I was taking an Uber ride with driver who is a professional basketball player (!) and I told her about Cal-Mag. She said she knows about it, which I was pleased to hear. This is good stuff.