Instead of reaching for that midday sugar bomb and risking the afternoon jitters, eat some heart-healthy chia seeds. In addition to being high in fiber and Omega-3s, their ratio of macronutrients--protein, carbs and fat--makes them a stable source of energy. According to the USDA's National Nutrient Database, one 28-gram serving contains 5.6 grams of protein, 8.4 grams of fat, 13.1 grams of carbs and 11.2 grams of fiber. Mix yours with some yogurt or blend into a smoothie.