BUILT Bars are popular high-protein, low-sugar, and low-calorie protein bars known for their candy bar-like taste and unique marshmallowy "Puff" texture. Founded in 2018 in Utah, they use a blend of whey protein isolate and collagen, typically providing 15-17g of protein per bar. They are generally gluten-free, keto-friendly, and come in various flavors like Coconut Almond and Mint Brownie.