Vitamin D is a fat soluble vitamin whose major function is to maintain normal blood levels of calcium and phosphorus. Calcium is a mineral that is necessary to maintain strong, healthy bones. It is also necessary for many bodily functions including muscle contraction, blood vessel contraction and relaxation, transmitting signals through the nervous system, and producing chemicals called enzymes and hormones. Calcium supplementation has also been shown to be effective in the treatment of premenstrual syndrome (PMS). PMS is a disorder characterized by physical and mental symptoms that interfere with normal life activities and interpersonal relationships.
A recent study reported that high dietary calcium and vitamin D intake may lower the risk of developing PMS. Women who reported an intake of approximately 1200 mg/day of calcium and 400 IU/day of vitamin D from their diet had a significantly lower risk of developing PMS compared to women with lower intakes. However, large prospective trials are needed to fully evaluate the effects of calcium and vitamin D supplements in the prevention of PMS.