I have non stop 24 hour a day a fib and have had it for years.I have tried magnesium and am still taking it and have recently started a multi mineral supplement. It has been said every disease and every thing that goes wrong in the body is a result of a lack of minerals but I am still waiting for the minerals to work. I would certainly like to know how much to take and how long it will take to get my heart rythmn corrected.