Calcium is the fifth most abundant element in earth and human body. It has multiple functions within our system such bone mineralization, neuromuscular excitability regulation, hemostasis, membrane transport, release of hormones and neurotransmitters, among others. For duodenal absorption of calcium, we need vitamin D, reason for which supplementation of both components is important to maintain adequate calcium homeostasis. However, it is entirely beneficial or can be harmful? As we know everything in excess has its consequences, as we describe below.
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