When buying vegetables, always think of the Green, Yellow, Orange & Red types.
Buy sweet bell peppers from all colors,get some cherry tomatoes from all colors too. You can also get squash & carrots, and green leafy varieties like spinach & rocca.
Why ,you might ask, should you eat more of these colored vegetables in particular?
The answer is easy; these colors contain carotenoids such as beta-carotene, lutein, and lycopene, and these help prevent prevent the kind of DNA damage that contributes to cardiovascular disease and cancer.
Eat these varieties in salads with a dab of virgin olive oil, that's the best way to absorb all the antioxidant properties they contain.