Which vitamin category does not accumulate in the body?

The correct choice is water-soluble vitamins. This category includes vitamins such as vitamin C and the various B vitamins (like B1, B2, B3, B6, and B12). These vitamins are not stored in significant amounts within the body. Instead, any excess of these vitamins usually gets excreted through urine, which minimizes the risk of toxicity. Regular dietary intake is necessary to maintain adequate levels, as the body does not retain them after they are absorbed.

In contrast, fat-soluble vitamins (like vitamins A, D, E, and K) are stored in body tissues and can accumulate, which can potentially lead to toxicity when consumed in excessive amounts over time. Minerals are essential nutrients that can also accumulate in the body, depending on the mineral in question, and certain amino acids can be stored and utilized by the body as needed. Therefore, only the water-soluble vitamins are characterized by their inability to accumulate significantly in the body.