Nature s Bounty Vitamin D - the Sunshine Vitamin is an essential nutrient that the body creates by converting cholesterol in the body via sunshine. However today s culture of cubicles sunscreen and near-round-the-clock indoor living minimizes our exposure to natural sunlight for the needed period of time for Vitamin D to form. Supplementing with Nature s Bounty Vitamin D3 is an easy way to increase your daily intake of this important nutrient.