Vitamin D3 is an essential nutrient that works with Calcium to help develop strong bones and teeth. Vitamin D3 also supports the immune system and neuromuscular health. Vitamin D3 is a potent and active form of Vitamin D. 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.