Which food is the major source of vitamin A?

Carrots and dark leafy vegetables are the major sources of vitamin A due to their high content of provitamin A carotenoids, primarily beta-carotene, which the body can convert into active vitamin A. These foods are rich in various carotenoids that not only contribute to their vibrant colors but also provide antioxidant properties. Vitamin A is essential for numerous bodily functions, including vision, immune function, and skin health.

While citrus fruits are well-known for their vitamin C content, they do not provide significant amounts of vitamin A. Whole grains are an essential part of a balanced diet, contributing to overall nutritional intake, but they are not a primary source of vitamin A. Red meats contain small amounts of retinol, which is a form of active vitamin A, but they do not match the concentration found in carrots and dark leafy vegetables, which are specifically rich in beta-carotene. Thus, the correct choice reflects the primary source of this vital nutrient from plant-based foods.