Vitamin D and your immune system

Decreasor of inflammation and pain. Vitamin D regulates the immune system, and two recent studies linked low levels of the vitamin to a greater inflammation risk. Another study reported that vitamin D deficiency was associated with chronic widespread pain. The vitamin’s role in preventing inflammation and pain may very well explain its documented benefits in easing low-back pain. 

Dose: 2,000 to 5,000 IU daily