Test Details: Vitamin D panel is done to identify conditions such as Rickets, Osteomalacias; to monitor the function of parathyroid gland; in old age patients with a risk of osteoporosis and to monitor the response in people undergoing treatment for vitamin D deficiency. Vitamin D helps in maintaining strong bones and teeth. Vitamin D is also useful in regulating levels of phosphorus, magnesium and calcium in the body. Vitamin D has also been known to influence the growth and differentiation of many other tissues in the body and helps in regulating the immune system.