Pure Encapsulations Vitamin D3 250 Veggie CapsVitamin D3: Provides 1000 IU of vitamin D3 per day Convenient once daily capsule format Vitamin D3 enhances calcium absorption and retention, a key nutritional function in supporting healthy bones and teeth. Decreased exposure to sunlight, a vegetarian diet and a low intake of vitamin D fortified foods often contribute to inadequate vitamin D levels. Clinical studies involving vitamin D supplementation suggest the importance of both vitamin D and