vitamine D play important role in calcium reabsorption

Expert Solution

Vitamin D is a fat soluble vital amine which is essentially required for absorption of calcium in the intestine and re-absorption of calcium in the renal system. This function of vitamin D is performed in corroboration with maintenance of parathyroid hormone concentration in the body. Studies have shown that the optimum concentration of parathyroid hormone i.e. PTH is essential for both absorption and reabsorption of calcium in the body. This function takes place by activation of vitamin D receptors in the body and hence, the uptake of calcium is increased in the body.

When vitamin D concentration is sufficient in the body, these vitamin D receptors are activated and due to secondary response against PTH, these receptors promote uptake of calcium in the intestine as well as renal tubule (distal tubule of the renal system) and hence up-regulate absorption and reabsorption of calcium, respectively.

This is why persons suffering from calcium deficiency are often provided with high dietary concentrations of vitamin D.

gladiator answered 1 year ago

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