If there is one vegetable you should not feel guilty about skipping, it's probably zucchini. Within our entire database of ORAC values, it is one of the lowest ranking foods, right there alongside meats and dairies which are almost universally a terrible source of antioxidants. Are zucchini good for you in other ways? Sure, they are a filling and very low calorie veggie. One cup of it raw and chopped (124 grams) is only 20 calories. With that you get 2 grams of protein which may not seem impressive, but think about it... if you ate 100 calories worth, you would be getting 10 grams of protein! That makes this a high protein vegetable. That one cup also provides you with 21 mg or 35% of your daily value of vitamin C, 10% for riboflavin, and 14% for vitamin B6. All other vitamins are in lower amounts. For minerals, the highest is manganese at 11% and potassium at 9%.
ORAC Source
USDA Database for the Oxygen Radical Absorbance Capacity (ORAC) of Selected Foods, Release 2 - Prepared by Nutrient Data Laboratory, Beltsville Human Nutrition Research Center (BHNRC), Agricultural Research Service (ARS), U.S. Department of Agriculture (USDA) - May 2010