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Go nuts.

Nuts such as almonds and walnuts have so much research backing their heart-protective powers that they’ve earned a qualified health claim from the FDA. Until recently, though, this recommendation came with a caveat: Eating the 1½ ounces that may reduce heart disease risk added up to only about 12 whole almonds, making it easy to overindulge, according to Goldberg. The heartening news: Last year, food scientists discovered that almonds have 32 percent fewer calories than previously thought, so you can enjoy a few more without compromising your waistline.