Tip 23: Have Some Soup.
In one study, published in the journal Physiology & Behavior, people consumed the fewest calories on days when they ate soup. Broth-based soups packed with veggies give you the biggest bang for your caloric buck. Get recipes for 30-minute low-calorie soups here.
For more diet challenge tips, meal plans and get-started guide, visit the Diet Challenge landing page.