Which vitamin is classified as fat-soluble?

Vitamin D is classified as a fat-soluble vitamin, which means it is absorbed along with fats in the diet and can be stored in the body's fatty tissues as well as the liver. Fat-soluble vitamins, including vitamins A, D, E, and K, play essential roles in various bodily functions, like regulating calcium and phosphorus levels in the bones and maintaining healthy immune function.

By contrast, vitamins such as vitamin C and the B vitamins (including B12) are water-soluble. Water-soluble vitamins are not stored in the body and must be consumed more regularly, as they are excreted through urine. Understanding the classifications of vitamins helps in recognizing their absorption, storage, and overall nutritional roles in the body.