Functions of Vitamin D

Vitamin D plays several key roles in the maintenance of organ systems. For example:

* Vitamin D helps regulate calcium concentrations in the blood. Since it works more like a hormone, its active form, calcitriol acts with the parathyroid hormone or PTH. If the calcium level is low, this would trigger the secretion of PTH, which would stimulate the conversion of vitamin D to calcitriol. Calcitriol would then act to increase calcium absorption in the intestines, calcium resorption in the kidneys and stimulate calcium release from the bones.

* Vitamin D helps maintain blood phosphorus levels. Low levels of vitamin D can result to an overactive parathyroid gland. Also with inadequate phosphorus in the body, bones cannot undergo normal mineralisation.

* It is also said that vitamin D benefits the immune system since the T-cells or immune cells have receptors for vitamin D. It acts by boosting phagocytosis, the bodily functions to combat tumours, modulate neuromuscular and immune functions and reduce inflammation.

* Vitamin D is also responsible for maintaining normal cell growth and function. It may be an important element to the prevention and treatment of cancer. It has also been suggested that vitamin D plays a role in regulating the growth and function of brain cells.

* Research studies suggest that vitamin D, because of its anti-inflammatory effect, plays a role in providing protection against osteoporosis, hypertension, cancer, type 1 diabetes, psoriasis and numerous autoimmune diseases.