Traditional potato or corn-based chips offer just about nothing in the way of nutrition (we’re talking little protein and fiber). In fact, in a study of 120,000 healthy, non-obese women and men taking part in long-term studies of diet and health, Harvard researchers found participants gained an average of 3.3 pounds every four years over a 13-year period. When they tallied up the foods that contributed the most to weight gain, potatoes and potato chips were at the top of the list. Other culprits included sugar-sweetened beverages, red meat, and processed meats. For a healthy potato chip alternative, try lentil or bean-based chips that have a comparable taste and texture coupled with fiber and protein.