Hi Dee Vitamin D3 50,000 IU contains high-strength cholecalciferol in soft gelatin capsules. Each pack contains 8 capsules designed to help prevent and treat vitamin D deficiency, support calcium absorption, and maintain healthy bones, teeth, muscles and immune function. Vitamin D3 (cholecalciferol) is essential for proper calcium and phosphorus absorption in the body. This high-dose supplement may be prescribed for treating severe vitamin D deficiency or for people with increased vitamin D requirements. The soft gelatin capsule formulation helps with better absorption. As with any high-dose vitamin supplement, this should be taken under medical supervision.