A bar needs a minimum of 300 calories and a good amount of protein, fat, and carbs to stand in for a meal, says Nelson. And while a bar for lunch is betterthan a Cinnabon, a balanced, healthful meal on a plate is still preferable.

Winner: Organic Food Bar Omega-3 Flax has just seven ingredients, 310 calories, and 3,000 milligrams of heart-healthy omega-3 fat, and it tastes like a nut-studded fruit roll-up.