Hypovitaminosis D

We take multivitamins pills. But we never take the opportunity to know what are the benefits of taking them. One of the vitamins that we usually miss out is vitamin D. below are a few goodness of vitamin D:
Vitamin D regulates the calcium and phosphorus levels in the blood by promoting their absorption from food in the intestines, and by promoting re-absorption of calcium in the kidneys, which enables normal mineralization of bone and prevents hypocalcemic tetany. It is also needed for bone growth and bone remodeling by osteoblasts and osteoclasts.
In the absence of vitamin K or with drugs (particularly blood thinners) that interfere with Vitamin K metabolism, Vitamin D can promote soft tissue calcification.
It inhibits parathyroid hormone secretion from the parathyroid gland.
Vitamin D affects the immune system by promoting phagocytosis, anti-tumor activity, and immunomodulatory functions.
When we lack adequate intake coupled with adequate sunlight exposure, (in particular sunlight with adequate ultra violet B rays), it will cause Hypovitaminosis D. Deficiency results in impaired bone mineralization, and leads to bone softening diseases, rickets in children and osteomalacia in adults, and contributes to osteoporosis. Osteomalacia may also occur rarely as a side-effect of phenytoin use. In conclusion, vitamin D plays an important role in the maintenance of organ systems.