When starting Re-Mag, start slow, see how you handle it then ramp from there. You should be fine. Let me know if you have any questions. You can google a list of things that deplete magnesium, one is if you sweat profusely when working outside, exercising, etc. I think that was the biggest reason for me. When my wife and I moved, our new home had a whole house water filtration system. I went from tap water with some minerals, to zero with the filtration. About a year after that was about the time when I went from proximal A-fib to permanent.
Jim