Flavonoids, the antioxidant-like compounds in OJ, may offset the heart-damaging effects of a calorie- and fat-laden meal, suggests a 2010 study in The American Journal of Clinical Nutrition. In the study, people who drank orange juice with a high-fat, high-calorie breakfast (51 grams fat, 900 calories) had lower levels of harmful free radicals and other inflammatory markers associated with heart disease after the meal than participants who drank plain water or sugar water and ate the same breakfast.
How Long Can You Keep OJ Before It Loses Its Nutrients? »
Next: 2. Fruit »