1. Pure Protein Bars High Protein These bars deliver a solid balance of protein and low sugar, with around 20 g of protein and low calories  per bar. They’re great for both pre- and post-workout fuel  or as a snack to help stabilize blood sugar during the day. Because they’re gluten-free and come in a variety pack, they appeal to many diets while helping you hit daily protein goals. They’re also a popular choice within Amazon’s best-selling protein bar category. 2. GoMacro Ma