People tend to think of citrus fruits in terms of the vitamin C that they offer but the bioflavonoids contained in citrus fruits offer more than just the benefits of vitamin C. Citrus fruits contain bioflavonoids that offer protection for the blood vessels of the body. They also protect the capillaries from damage. The compounds found in citrus bioflavonoids include eriodictyol, tangeretin, nobiletin, naringenin, hesperidin, and quercetin.