NuGo Slim low sugar protein bars keep you energized and satisfied, with 16-18g protein, 6-7g of fiber, 5-6 net carbs, only 2-3g of sugar, and a tested very low glycemic index of 24-29. Real Dark Chocolate coated Slim bars are free of gluten, maltitol and artificial sweeteners. Four NuGo Slim flavors are vegan and pareve.