Nature Made Vitamin D 1000 IU Recommended By Pharmacists. For More Than Just Healthy Bones and Teeth. Vitamin D, also known as the "sunshine vitamin", is important for strong bones and teeth. In addition, recent findings show that it also plays a major role in healthy cell development and helps keep the immune system strong. Vitamin D is a fat soluble vitamin found in fortified milk, oily fish, and in some cereals. However studies show that most individuals do not meet the body"s requirements for Vitamin D. Our skin also makes vitamin D when exposed to sunlight. Those who are sensitive to sunlight exposure may prefer to take a supplement instead to promote overall health.