Vitamin D3 1,000 IU Natural Factors® Vitamin D3 is essential for strong bones and teeth as it increases the body's absorption of calcium from food. Its role in regulating calcium levels also helps regulate the immune system and maintains healthy nerves and muscles. Vitamin D3 is carefully blended with organic flaxseed oil in an easy-to-swallow softgel. Suggested Usage: 1 softgel per day or as directed by a health professional. Keep out of reach of children. Contains no artificial preservatives, color or sweeteners; no corn, dairy, starch, gluten, wheat or yeast.