Warning: These High-Protein Foods in Your Kitchen Are Rife With Hidden Sugar

"Nuts are a great source of protein," said Lori, "but trail mix often also involves dried fruit with additional added sugar (cranberries and raisins are often the culprits) and even chocolate chips or other candies that make the sugar content add up fast." Reduce your ratio of M&Ms to nuts and seeds (we know, buzzkill) by making your own trail mix.