Which of the following is NOT a fat-soluble vitamin?

Vitamin C is categorized as a water-soluble vitamin, distinguishing it from fat-soluble vitamins such as A, D, and E. Fat-soluble vitamins, which include vitamins A, D, E, and K, are absorbed along with dietary fat in the intestine and require the presence of dietary lipids for absorption. These vitamins are stored in the body's fatty tissues and liver, allowing them to remain in the body for longer periods compared to water-soluble vitamins, which are not stored and are excreted more readily through urine. Consequently, while vitamins A, D, and E contribute to various critical functions in the body—such as vision, bone health, and antioxidant protection—vitamin C primarily serves as an antioxidant and is crucial for collagen synthesis, but it does not have the same storage capacity or absorption characteristics as the fat-soluble vitamins.