“Leeks can support sexual functioning and reduce the risk of prostate cancer,” says Michael Dansinger, M.D., an assistant professor of medicine and an obesity researcher at Tufts–New England Medical Center, in Boston. “Chop the green part of a medium leek into thin ribbons and add it to soups, sautés, and salads as often as possible.” These scallionlike cousins of garlic and onions are also packed with bone-bolstering thiamine, riboflavin, calcium, and potassium, and they’re also rich in folic acid, a B vitamin that studies have shown to lower levels of the artery-damaging amino acid homocystein in the blood.