Excessive intake of which vitamin is likely to lead to toxicity due to its fat solubility?

The correct answer is vitamin E, which is a fat-soluble vitamin. Fat-soluble vitamins, including vitamins A, D, E, and K, are stored in the body's fatty tissues and liver, leading to a higher risk of toxicity if consumed in excessive amounts. Unlike water-soluble vitamins, which are excreted through urine, fat-soluble vitamins can accumulate in the body, potentially reaching harmful levels.

Vitamin E plays a crucial role as an antioxidant, protecting cells from damage caused by free radicals. However, when taken excessively, it can interfere with the blood's ability to clot, leading to increased risk of bleeding and other health issues. In contrast, vitamins such as C, B2, and B3 are water-soluble, meaning they are not stored in the body to the same extent and are less likely to cause toxicity through dietary intake. This fundamental difference in solubility and storage capacity is why excessive intake of vitamin E poses a higher risk for toxicity compared to the other vitamins listed.