Ispthbrin, In my personel use I prefer the buffered organic salt chelates of mag glycinate, aspartate, orotate over the unbuffered inorganic salts of mag oxide, carbonate, chl, sulf. In my experience the buffered mag is tolerated better in the gut and is said to be better absorbed and I believe that is true. A person can try different kinds and see what works best for them. I am just stating what works best from my own experience and the need for all of us to take a look at our magnesium requirements should you be afflicted by a disorder of the circulatory system as a first line defense. Not the last thing that is tried. There is much info that points to mag deficiency in heart and circulatory disease but unfortunatly the word is not getting out even today. Many years ago scientists declared mag to be an essential mineral for life. The NAS has determined that most Americans are mag deficient. So when I hear someone ask a question about elevated bp or heart problems I ask myself if those people know about getting enough magnesium into their bodies first thing, may easily solve their problem. This is my story. My diastolic bp was always slightly elevated from 85-100 mm hg and my systolic was normal with occasional irregular heart beat for years. No matter what I did I could never get the diastolic to come down until I started supplementing magnesium. It was that easy. I see grz bear is having the same problem. So I hope he will use mag if he is not already and of coarce diet, exercise, weight loss are the first things to do too. JM