Most calcium tablets are made of calcium lactate (like calcium in milk), calcium carbonate, calcium sulfate, etc. These calcium tablets, in binding form, are acidic and cannot neutralize the acidic toxins in the body. Also, you must take these calcium tablets with Vitamin D and citric acid in order for them to be absorbed. Consider that if these tablets are taken in excess, hardening of blood vessels and formation of gall or kidney stones may result. Maxmyer NanoCalcium contains an ionized form of calcium that is alkaline and is absorbed about 90 to 95% into the body. This NanoCalcium can be put to use without requiring additional digestion through the spleen and stomach.