Natures Plus Vitamin D3 is derived from plant sources and is essential for bone health and the immune system. Each capsule provides 1000 IU of Vitamin D3. Vitamin D3 is important for calcium absorption and immune system regulation. Keep your bones strong and support your overall well-being with this supplement. Composition Vitamin D3 (cholecalciferol from lichen), Sunflower oil, Capsule (vegetable gelatin, glycerin, water), Mixture of other ingredients. Instructions for use Take 1 capsule daily with a meal.