Yes, you read that right. Vitamin D isn’t just a nutrient you eat or a vitamin you take. Vitamin D is also a hormone that our bodies make when our skin is exposed to sunlight. The process happens because our skin cells have receptors that create vitamin D when they absorb ultraviolet B (UVB) rays. Not only can your body make vitamin D, but it can make the majority of the vitamin D you need if it gets enough sunlight. If you don’t get enough sun or have a condition that makes it difficult for your body to use the vitamin D it makes, that’s when you may need a supplement. But check with your healthcare provider (HCP) first!