Bluebonnet Nutrition - Vitamin D3 5000 IU - 60 Vegetarian Capsules Bluebonnet?s Vitamin D3 5000 IU Capsules provide natural vitamin D3 (cholecalciferol) from lanolin. Available in easy-to-swallow vegetable capsules for maximum assimilation and absorption. VitaminsVitamins differ from macronutrients like carbohydrates proteins and fats by virtue of the amount required. Typically minuscule amounts are needed in comparison. Plus vitamins are not used as an energy source. Instead they are critical for the normal functioning growth repair and maintenance of cells and tissues and are required in individual units rather than long chains of smaller units. However like carbohydrates proteins and fats vitamins are organic compounds meaning that they are carbon-containing and are essential to one s overall well-being. In fact a deficiency of just one vitamin can have a profound effect on the body and health. Vitamin D is a fat-soluble nutrient that requires conversion in the liver