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, croscarmellose sodium, stearic acid, vegetable grade magnesium stearate (lubricant), silica. Softgel: Softgel (gelatin, glycerin, purified water), organic flaxseed oil. Vitamin D intake, when combined with sufficient calcium, a healthy diet and regular exercise, may reduce the risk of developing osteoporosis in people with vitamin D deficiency. Helps prevent vitamin D deficiency.