What are some well-known Antioxidants? Vitamin A – found in carrots, squash, broccoli, sweet potatoes, tomatoes, kale, collard greens, cantaloupe, peaches and apricots. Vitamin C – found in oranges, lines, green peppers, broccoli, green leafy vegetables, strawberries and tomatoes. Vitamin E – found in nuts and seeds, whole grains, green leafy vegetables and vegetable oil….