Protein bars have long been every fitness enthusiast's and snack fiend's best friend. They are available in countless innovative flavors, stifle hunger, and help you meet your #gains goals, thanks to protein's role in muscle building. But sometimes, these friends are actually foes in disguise; A crinkly wrapper can conceal a chalky, bitter bar that's hard enough to break a tooth and will leave your stomach growling in 20 minutes flat.
