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The body needs vitamin D to absorb calcium. Without enough vitamin D, one canât form enough of the hormone calcitriol (known as the âactive vitamin Dâ). This in turn leads to insufficient calcium absorption from the diet. In this situation, the body must take calcium from its stores in the skeleton, which weakens existing bone and prevents the formation of strong, new bone. You can get vitamin D in three ways: through the skin, from the diet, and from supplements.
Vitamin D is essential to the proper absorption of calcium. Vitamin D allows calcium to pass from your gut into your bloodstream so that your body has access to the mineral. Without sufficient vitamin D, your body cannot absorb calcium, regardless of how much you consume. You can increase the amount of vitamin D in your body by taking in more vitamin D-rich foods, such as salmon, mackerel, sardines, fortified milk, egg yolks, enriched cereals and fortified orange juice.