Vitamin D 2 is the form added to milk and used for supplementation.
Vitamin D stimulates the absorption of calcium.
Exposure to adequate amounts of sunlight is the best way to assure your vitamin D level is normal. Postmenopausal women who live in northern latitudes may need supplementation in the winter when exposure to sunlight is limited. Dosage should not exceed 1000 IU a day. Its intent is solely informational and educational. The information is not a substitute for talking with your health professional.