Which of the following is a good source of vitamin C?

Citrus fruits are widely recognized as an excellent source of vitamin C. This vitamin is essential for numerous bodily functions, including the synthesis of collagen, absorption of iron, and maintenance of the immune system. Citrus fruits, such as oranges, lemons, limes, and grapefruits, contain high concentrations of ascorbic acid, which is the active form of vitamin C.

While other options, such as dark leafy greens, do contain some vitamin C, citrus fruits are particularly notable for their high levels and bioavailability, making them a standout choice for fulfilling daily vitamin C needs. Red meat and whole grains are not significant sources of vitamin C; red meat primarily provides iron and protein, while whole grains focus on complex carbohydrates and fiber, lacking in ascorbic acid.