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Why are citrus fruits an important source of vitamin C?

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Sapindales Tangerine (*Citrus reticulata deliciosa*)

Citrus fruits, which belong to the Rutaceae family within the order Sapindales, are considered among the best dietary sources of vitamin C (ascorbic acid).123

Vitamin C is a water-soluble, carbohydrate-like substance that is essential for human health because humans cannot synthesize it internally and must obtain it through their diet. Citrus fruits are particularly important because they provide a dense, nutrient-rich package that helps meet the daily requirement of approximately 75–90 milligrams for adults.12

Beyond preventing scurvy, vitamin C is vital for the synthesis of collagen, which is necessary for the maintenance of skin, blood vessels, bones, and connective tissues. Furthermore, as a powerful antioxidant, vitamin C helps protect cells from damage caused by free radicals and supports the immune system. Consuming citrus fruits is also associated with a reduced risk of various chronic conditions, including cardiovascular disease and certain types of cancer.12