HEART HERO

Kumquats are tart, sweet and tiny, and Chinese researchers say enjoying a heaping cup of them each day could reduce your risk of heart disease by 25 percent. The reason: Kumquat skins are laced with a healing plant compound that tamps down cholesterol production by as much as 16 percent, plus relaxes arteries—an effect that lowers blood pressure by up to 6 points.

hesperidin,

Eating one pink grapefruit a day boosts the production of germ-fighting antibodies and T cells by up to 33 percent, so you can quickly trounce invading viruses and bacteria, plus bounce back two days faster if you do fall ill, say UCLA scientists. The...