Along with currants, they are true berries that is single fruits derived from the plant's ovaries. Star berries is the name Native American tribes gave the wild blueberry because the calyx, or blossom end of the berry, forms a perfect five pointed star. Dr. Nathan Sharon, a biochemist at Tel Aviv University in Israel has found that blueberries also have bacteria fighting capabilities. They are, like cranberry juice, particularly useful in combating urinary tract infections. Wild blueberries are smaller and sweeter than the cultivated larger berries available at supermarkets.
Blueberries are a good source of vitamin C, provide some fiber, and are low in sodium.
Half a cup of berries has only 41 calories. Blueberries should be used within a day or two. Their short shelf life can be prolonged by spreading them out in a single layer, refrigerating, and washing very gently just before using. Should you fare better than we and find yourself with a surplus of blueberries, freeze them in a single layer on a tray or sheet. Once frozen, transfer to plastic to keep for up to two years.