Most Calcium Magnesium supplements are offered in a ratio of 2:1, while recommendations by nutritional practitioners can vary from a 4:1 to a 1:1 calcium to magnesium ratio. Some sources claim that calcium and magnesium oppose each other at the intracellular level, thus low magnesium intake causes high calcium storage, or calcification. Other sources maintain that magnesium is needed for proper calcium absorption, and that low magnesium intake can be responsible for low calcium levels... Full Text