The other two diets examined by the team were built on the Step 1 plan - one added 10% of calories from pistachios (about 1.5 ounces), the second added 20% of daily calories (3.0 ounces) from pistachios. The diets that included pistachios brought higher blood levels of antioxidants than found in the blood of those eating the so-called typical American diet without pistachios.

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