A blood orange is smaller than a regular orange and features a sweeter flesh that ranges in color from maroon to blood red. Blood oranges come primarily from Mediterranean climates. California and southern Italy are major producers.
Blood oranges typically look like regular oranges, but the skin can sometimes have a reddish blush. The fruit gets its color from anthocyanin, a chemical that develops in citrus fruits that experience warm days and cool nights. The season for blood oranges is December through March. Blood oranges are rich in antioxidants and are a good source of vitamin C and fiber which helps to lower cholesterol.