D5000 contains vitamin D3 (cholecalciferol) in convenient softgels. Vitamin D3 is the bioidentical form of vitamin D synthesized in the body from cholesterol, following activation by the UV rays in sunlight. This form is excellent for maintaining healthy levels of vitamin D in the body. Mounting evidence suggests roles for vitamin D not only in bone health, but also in supporting immune, neurological, musculoskeletal, cellular, and cardiovascular health. Supports Bone and Dental Health. Supports Modulation of Immune Function. Supports Neurologic and Cognitive Health. Supports Musculoskeletal Comfort. Supports Cardiovascular Health and Healthy Blood Sugar Metabolism.