Vitamin D benefits - Health benefits of vitamin d

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-Maintenance of blood calcium levels within a narrow range is vital for normal functioning of the nervous system, as well as for bone growth, and maintenance of bone density.
Vitamin D is essential for the efficient utilization of calcium by the body.

-Cellular differentiation results in the specialization of cells for specific functions in your body. In general, differentiation of cells leads to a decrease in proliferation. While cellular proliferation is essential for growth and wound healing, uncontrolled proliferation of cells with certain mutations may lead to diseases like cancer.
The active form of vitamin D, inhibits proliferation and stimulates the differentiation of cells.

-Active vitamin D is a potent immune system modulator. There is plenty of scientific evidence that vitamin D has several different effects on immune system function that may enhance your immunity and inhibit the development of autoimmunity.

-The active form of vitamin D plays a role in insulin secretion under conditions of increased insulin demand.Limited data in humans suggests that insufficient vitamin D levels may have an adverse effect on insulin secretion and glucose tolerance in type 2 diabetes.More studies are needed on the role of vitamin D and diabetes.

-Adequate vitamin D levels may be important for decreasing the risk of high blood pressure.Again, more studies on vitamin D and hypertension are necessary.

Effects of lack of vitamin D

Without sufficient vitamin D, bones can become thin, brittle, or misshapen. Deficiency can arise from inadequate intake coupled with inadequate sunlight exposure; disorders that limit its absorption; conditions that impair conversion of vitamin D into active metabolites, such as liver or kidney disorders; or, rarely, by a number of hereditary disorders.

Vitamin D deficiency results in impaired bone mineralization and leads to bone softening diseases, rickets in children and osteomalacia in adults, and possibly contributes to osteoporosis.

External links:
Sciencedaily:Vitamin D benefits