Which vitamins are classified as water-soluble?

The classification of vitamins into water-soluble and fat-soluble categories is essential for understanding their roles, absorption, and storage in the body. Water-soluble vitamins include the B vitamin complex (such as B1, B2, B3, B5, B6, B7, B9, and B12) and vitamin C.

These vitamins are soluble in water, meaning they can dissolve in the body's fluids and do not require fat for absorption. They are excreted through urine when consumed in excess, which means they need to be replenished regularly through diet. This characteristic highlights the importance of consistent dietary intake of water-soluble vitamins to maintain adequate levels for bodily functions such as energy production, immune function, and the formation of red blood cells.

In contrast, the other options include fat-soluble vitamins. Vitamins A, D, E, and K, for example, are stored in the liver and fatty tissues and can accumulate in the body, which makes their intake more regulated compared to water-soluble vitamins. Therefore, choice C accurately identifies the correct classification of vitamins B and C as water-soluble.