Which of the following vitamins is NOT fat-soluble?

Vitamin C is classified as a water-soluble vitamin, which differentiates it from fat-soluble vitamins like A, D, and E. Water-soluble vitamins are characteristically absorbed directly into the bloodstream and typically not stored in significant amounts within the body. They are excreted through urine when consumed in excess, which means they need to be ingested regularly in the diet.

In contrast, fat-soluble vitamins require dietary fats for absorption and can be stored in the liver and fatty tissues for later use. This storage capability means that fat-soluble vitamins can be retained in the body for a longer period, sometimes leading to toxicity if consumed in excessive amounts. The understanding of these differences is crucial for nutritional planning and ensuring proper vitamin intake for overall health.