Rice cakes: These diet staples and simple carbohydrates are high on the glycemic index. This means they provide a rush of energy that wears off quickly and can leave you hungry and craving more food before too long. Instead of eating two rice cakes, try one topped with nut butter, which will keep you fuller for longer while also providing protein.

Soda, even diet: Sugary sodas make it challenging for the body to maintain healthy glucose and insulin levels, according to Gonzalez-Lomas. He also points to the phosphorous often found in soda, which increases calcium loss and hurts bone health. Diet sodas are potentially worse with low doses of carcinogens and artificial sweeteners, he said.

Canned vegetables: While Americans don't eat near enough vegetables, some canned veggies are stored in cans laced with the industrial chemical BPA. The chemical is thought to pose health risks in fetuses, infants and young children's brain development, Consalvo said. Try going with fresh or frozen vegetables, but if you must buy canned veggies, look for brands that use BPA-free cans and hard plastics.