Tip - Food Sources of Vitamin D3 | LIVESTRONG.COM

Vitamin D is commonly referred to as the "sunshine vitamin" because it's the only vitamin that can be made by the human body from sun exposure. It plays a very important role in health. The active form of vitamin D is known as vitamin D3 or cholecalciferol. The recommended adequate intake (AI) level for vitamin D3 is 5mcg daily for...