Garlic

Peak Season: Year-round

Perfect Pick: The bulb should feel heavy for its size, with tightly closed cloves in the bulb that remain firm when gently pressed. The skin can be pure white or have purple-tinged stripes and should be tight fitting.

Handle with Care: Place bulbs in a cool, dark, well-ventilated location for up to 1 month.

The Payoff: The cancer-fighting compound allicin, which can cut down Helicobacter pylori—the bacteria strain responsible for the development of stomach ulcers.