On mornings I don't have time to make my 400-calorie weight-loss smoothie, I grab a One Protein Bar in Birthday Cake ($25 for 12) for breakfast. But it's not just a meal replacement; if I have had a particularly tough workout and need a protein-packed pick-me-up, I reach for one in the afternoon. Each bar has 13 grams of net carbs (22 grams of total carbs) and 20 grams of protein to keep you satisfied.