Food sources are always in balance. Unabsorbed calcium which most are can cause calsium deposits in kidneys, joints, etc. MCFI from seaweeds has good research and is from food and New Chapter calcium is in food matrix. It's the dairy,sodas,caffiene that cause the calcium defiency. After 23 straight years of nursings sometimes 2 at a time and pregnancy my calcium levels are good and bones strong.
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