Which nutrient can become toxic if consumed in excess and is primarily stored in the liver?

Vitamin A is the nutrient that can become toxic if consumed in excess and is primarily stored in the liver. This fat-soluble vitamin plays a crucial role in several bodily functions, including vision, immune function, and skin health. Unlike water-soluble vitamins, which are excreted when taken in surplus, fat-soluble vitamins like Vitamin A can accumulate in the body's tissues, especially in the liver, leading to potential toxicity.

Excessive intake of Vitamin A can result in hypervitaminosis A, a condition characterized by various symptoms ranging from nausea and vomiting to more severe effects such as liver damage, headaches, and blurred vision. This risk is significantly heightened with the consumption of high-dose supplements or certain animal-based foods very rich in Vitamin A, such as liver.

Understanding the storage and potential toxicity of fat-soluble vitamins is essential in nutritional education, particularly regarding the appropriate inclusion of these nutrients in a balanced diet.