Is Vitamin G a Vitamin?

Despite its name, vitamin D is not a vitamin, but a prohormone, or precursor of a hormone. Vitamins are nutrients that the body cannot create, and so a person must consume them in the diet. However, the body can produce vitamin D.

Is vitamin D an actual vitamin?

Vitamin D is actually a hormone rather than a vitamin; it is required to absorb calcium from the gut into the bloodstream. Vitamin D is mostly produced in the skin in response to sunlight and is also absorbed from food eaten (about 10% of vitamin D is absorbed this way) as part of a healthy balanced diet.

Why is vitamin D called a vitamin?

The Benefits of Vitamin D. Vitamin D is sometimes called the “sunshine vitamin” because it's produced in your skin in response to sunlight.