Berries are an excellent source of potassium, vitamin C, and fiber. In general berries are a good source of vitamins and phytochemicals. Phytochemicals are components of fruits and vegetables that may help to prevent diseases, and perhaps even help to treat some disorders. For instance, cranberries and blueberries contain a substance that helps to prevent and treat painful bladder infections. Extracts from blueberries and strawberries have been shown to have anti-cancer properties in laboratory settings. Red raspberries have also demonstrated similar anti-cancer properties in the lab. Dark colored berries, like black raspberries, contain powerful antioxidants which may help to slow down the aging process and keep us healthier.
Berries (especially blueberries and raspberries) also contain lutein, which is important for healthy vision. There are other berries that offer similar nutrition and healthful benefits including loganberries, currants, gooseberries, and bilberries.