Blueberries (Vaccinium sp.) and raspberries (Rubus sp.) in a fruit bowl. Blueberries contain phytochemicals called anthocyanidins, which protect the body against damage by free radicals, helping to prevent cancers and protecting the heart. Blueberries also contain pterostilbene, which may lower cholesterol. Rasberries are a good source of vitamins A, C and K. They are also high in fiber and magnesium.