The USDA Human Nutrition Research Center on Aging in Boston has developed an assay called ORAC (oxygen radical absorbance capacity), which qualifies the antioxidant capacity of foods. Fresh blueberries have a high level of ORAC, 2400 per 100 grams. (As a comparison, five servings of some fruits and vegetables in a typical American diet score around 1600)

In a US Department of Agriculture (USDA) laboratory at Tuft's University in Boston, Massachusetts, researchers have found that blueberries rank #1 in antioxidant activity when compared to 40 common fresh fruits and vegetables. Concord grape juice is next on the list with about two thirds of the antioxidant activity of blueberries followed by strawberries, kale, and spinach.

What are antioxidants?

ScienceDaily (Apr. 20, 2009) — Could eating blueberries help get rid of belly fat? And could a blueberry-enriched diet stem the conditions that lead to diabetes? A new University of Michigan Cardiovascular Center study suggests so.

The new research, presented April 19 at the Experimental Biology convention in New Orleans, gives tantalizing clues to the potential of blueberries in reducing risk factors for cardiovascular disease and metabolic syndrome. The effect is thought to be due to the high level of phytochemicals – naturally occurring antioxidants – that blueberries contain.

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This chart graphically details the %DV that a serving of Blueberries provides for each of the nutrients of which it is a good, very good, or excellent source according to our Food Rating System. Additional information about the amount of these nutrients provided by Blueberries can be found in the Food Rating System Chart. A link that takes you to the In-Depth Nutritional Profile for Blueberries, featuring information over 80 nutrients, can be found under the Food Rating System Chart.

Health Benefits

Blueberries are literally bursting with nutrients and flavor, yet very low in calories. Recently, researchers at Tufts University analyzed 60 fruits and vegetables for their antioxidant capability. Blueberries came out on top, rating highest in their capacity to destroy free radicals.