Our body naturally produces Vitamin D when exposed to sunshine. But due to the winter season, weather conditions, sunscreen and our indoor lifestyle, the body's ability to produce optimal Vitamin D levels may result in a deficiency in this important nutrient. Take 1 capsule daily with food or as directed by your healthcare professional. Not to be taken during pregnancy or lactation unless under medical supervision. Those with hyperparathyroidism or sarcoidosis should not take Vitamin D without consulting a physician. Always read the label. Take only as directed.