Tuna or chicken on their own can be a tasty, healthy, and filling meal. The problem starts when you make them into a “salad”—while the word connotes freshness and nutrition, tuna and chicken salad have very little of either one, says Sam Presicci, RD, lead registered dietitian at Snap Kitchen. These salads are packed with mayo and other oils that can easily go rancid in addition to being packed with calories. Instead, go for plain or lightly seasoned tuna or chicken on top of salad greens. Easy swaps are just one of the 35 secrets nutritionists won’t tell you for free.