When it comes to a heart-healthy diet, most folks automatically flock to poultry or fish, but a recent study suggests it could be beneficial to reconsider positions on red meat. According to the USDA, one 3-ounce serving of lean beef is about 150 calories and contains many B vitamins that are crucial to heart health. "The (Dietary Approaches to Stop Hypertension) diet is currently the gold standard for contemporary diet recommendations.