Hanger got you feeling nutty? Reach for a treat that contains 16g of protein and 7.5g of collagen in every bar. PRIMAL KITCHEN® COLLAGEN FUEL® Peanut Butter Bars are here! Made without gluten, grains, dairy, soy, or whey, this bar boasts only high-quality ingredients like real peanut butter, organic monk fruit extract, and egg whites.