No category of health benefits from summer squash is better researched than the category of antioxidant benefits. As an excellent source of manganese and vitamin C as well as a good source of vitamin A (through its concentration of carotenoid phytonutrients), summer squash provides us with a great combination of conventional antioxidant nutrients. But it also contains an unusual amount of other antioxidant nutrients, including the carotenoids lutein and zeaxanthin. These antioxidants are especially helpful in antioxidant protection of the eye, including protection against age-related macular degeneration and cataracts. While we often think first about carrots as providing us with antioxidant-related eye health benefits, we also need to start including summer squash in our list of antioxidant-rich foods that can provide us with health benefits in this area. To obtain full antioxidant benefits from summer squash, we need to eat not only the flesh, but also the skin and the seeds.