Protein bars can also help tide you over when quick food is your only option. Best Protein BarsBest Overall:Best For Longevity: Novos Longevity BarBest Tasting:Best For Nut Allergies:Best With Whole Foods:Unfortunately, the market is flooded with options, making it hard to know which are the best protein bars out there. But most protein bars should have some universal things in common, which is why it's important to pore over the ingredients list. "Look for quality sources of protein such as lean animal protein sources, whey protein isolate, eggs/egg whites, or plant-based sources such as pea protein or brown rice protein, often found as a blend," Asche says. These are the best protein bars to meet a range of needs, whether for a post-workout snack or meal replacement.