Vitamin D functions as a hormone, a chemical messenger with widespread effects in the human body. * It is important for optimal bone, cardiovascular, neuromuscular, and immune health. * Adequate calcium and vitamin D throughout life, as part of a well-balanced diet, may reduce the risk of osteoporosis. * Supplementation with vitamin D may be necessary to meet daily needs, since obtaining sufficient vitamin D from natural food sources and sun exposure alone can be difficult. Research shows that vitamin D3 (cholecalciferol) is approximately 87% more potent than vitamin D2 for raising and maintaining vitamin D blood levels. * Servings Per Container: 100 Not to exceed one capsule per week unless directed by a healthcare professional. Serving Size: 1 capsule Amount Per Serving Vitamin D3 ... 50, 000IU (as cholecalciferol) Other Ingredients: Microcystalline cellulose, gelatin capsule Contains NO: Dairy, egg, fish, shellfish, nuts, wheat, gluten, soy, sugar, yeast, or artificial colors.