Which group of vitamins can accumulate in the body and potentially lead to toxicity?

The group of vitamins that can accumulate in the body and potentially lead to toxicity is the fat-soluble vitamins. These vitamins, which include vitamins A, D, E, and K, are stored in the body's fatty tissue and liver. Because they can be stored for extended periods, excessive intake can lead to a buildup, resulting in toxicity.

In contrast, water-soluble vitamins (such as the B vitamins and vitamin C) are not stored in large quantities within the body. Instead, they are excreted through urine when taken in excess, making toxicity much less likely. Minerals, while some can also accumulate and lead to toxicity, are not classified as vitamins. The B complex vitamins are a subset of water-soluble vitamins and thus follow the same excretion process, reducing the risk of toxicity as well.