The American diet has lost many of its natural sources of vitamin E, and estrogen depletes vitamin E, increasing the body's demand for it. Supplementation of vitamin E is absolutely necessary to prevent PMS symptoms. Vitamin A is necessary for the body to ward off environmental pollutants, and seems to prevent the development of breast and cervical cancer. Vitamin A is reduced with illness, during times of stress, if we smoke, or if we are pregnant or nursing. For vitamin A's antioxidant properties to work, intake must be at least 5,000 units a day or greater.
Vitamin D is necessary for calcium and magnesium to be absorbed.
Vitamin D is absorbed through the skin by sunlight.