I was looking on-line to order a calcium magnesium combo. I thought the ratio was 2 : 1 cal to mag. I just stumbled upon the University of Arizona calcium supplement guidelines. In it is says that according to the national academy of science, the safe upper limit of magnesium is no more than 350 mg per day. It also says the elemental calcium from calcium citrate =21%, from carbonate=40%. With 1500 mg calcium citrate, we only absorb 315mg ? Is this correct ? Any advice on choosing supplements would be greatly appreciated! Sorry to be so confusing but I am confused . Maybe I have been reading too much. The Dr. told my husband to throw out the computer !





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