Hi Dee Vitamin D3 5000IU contains cholecalciferol in soft gelatin capsules, providing essential vitamin D supplementation. Each pack contains 30 capsules designed to support bone health, calcium absorption, and immune system function. Vitamin D3 (cholecalciferol) plays a crucial role in calcium and phosphorus absorption, which is essential for bone formation and maintenance. This supplement may be beneficial for individuals with limited sun exposure, those at risk of vitamin D deficiency, or people requiring additional vitamin D support. The 5000IU dosage provides a moderate to high strength supplementation option. As with any supplement, it should be taken under medical supervision.