The Yellows - Bromelain in pineapple. This enzyme may ease indigestion & asthma. Grilled pineapple slices make a sweet, simple dessert. Limonoids - citrus These may lower cholesterol & protect against breast, skin, & stomach cancers. Zest away: Limonoids are concentrated in citrus peel. Lutein & Zeaxanthin - corn, leafy greens. This duo keeps eyes strong, protecting the retina & reducing the risk of cataracts & age-related macular degeneration. Freezing corn may increase lutein levels.