Vitamin D is the sunshine vitamin, which the body creates when skin is exposed to ultraviolet light. It is essential for immune function, calcium absorption, building and maintaining strong bones and teeth, and overall health. Many individuals lack sufficient vitamin D, and vitamin D supplementation is widely recommended throughout life. Medicinal Ingredients Non-Medicinal Ingredients Tablet: Microcrystalline cellulose, dibasic calcium phosphate dihydrate, vegetable grade magnesium stearate (lubricant). Softgel: Softgel (gelatin, glycerin, purified water), organic flaxseed oil. Helps in the absorption and use of calcium and phosphorus, and in the normal development and maintenance of bones and teeth. A factor in the maintenance of good health.