Citrus fruits, strawberries, cantaloupe, green peppers, broccoli, dark green leafy vegetables. Tomatoes Contain lycopenes – an antioxidant more potent than vitamin C. Stimulates immune function and may slow degenerative diseases. Fruit or vegetable? A fruit is the edible part of the plant that contains the seeds, while a vegetable is the edible stems, leaves, and roots of the plant.