The first DASH (Dietary Approaches to Stop Hypertension) study was published in 1997. And it’s still the bedrock of today’s advice from the American Heart Association, American College of Cardiology, American Cancer Society, and others: Eat a diet rich in fruits and vegetables, include low-fat dairy, poultry, fish, beans, whole grains, oils, and nuts, and limit sweets, sugar-sweetened beverages, and red meats.