Doctor's Best, Best Vitamin D3, 5000 IU, 360 Softgels

5,000 IU per softgel capsule Supports healthy bone density and structure Enhances immune, cardiovascular, and enhances cellular function Vitamin D3 from Doctor's Best features 5,000 IU of cholecalciferol per softgel capsule. Cholecalciferol is derived from lanolin, which is a component of sheep's wool. Vitamin D3 is known to interact with over 200 different genes and thus plays a crucial regulatory role as a metabolic activator for a multitude of metabolic processes.