A single type of fruit or vegetable often contains several different bioflavonoids, but certain foods are especially rich in a particular compound. For example, red grapes, wine and olive oil are exceptionally rich sources of resveratrol, while apples and red, blue and purple berries contain abundant anthocyanidin.itamin C, also called ascorbic acid, is an essential vitamin you must consume as part of your food. It is crucial for many processes that help your body function normally and help you stay healthy. Vitamin C also has potent antioxidant activity that may help protect you from illness.