Nature’s Bounty Vitamin D commonly knows as the “Sunshine Vitamin” is an essential nutrient created by the body by converting cholesterol in the body via sunshine. However, today’s culture of living near-round-the-clock indoor, cubicles and sunscreen, and minimizes the natural sunshine exposure so we don’t get the needed level of sunlights which regularize the formation of vitamin D in our bodies . Supplementing with Nature’s Bounty Vitamin D3 is the easiest way to increase your daily intake of this important vitamin D. This supplements is not standard Vitamin D, but is a potent and active form of Vitamin D which usually referred to as vitamin D3. Essential to the absorption of Calcium and sporting strong and healthy bones. Effective supplement in helping maintain a healthy immune system. Packaging may vary due to redesign, same great product ingredients.