I just started taking one 240 mg magnesium glycinate capsule in the evening. I had a cardiac ablation for my Afib six years ago, but I am having some palpitations and rapid heartbeat lately. I have also had some sleep issues, so I thought I would try taking the magnesium even though neither my cardiologist or PCP recommended it. It’s nice to hear from someone who is taking the magnesium and it has helped.