Once in a while, we curate brands that share our philosophy of clean wholesome nutrition. CHIEF. Collagen Bars is one such brand. Using only the finest ingredients such as regenerative grass-fed beef collagen (better for environment), camu-camu, MCT, these super-delicious bars are perfect for travel, breakfast, snacking, workouts. KETO-FRIENDLY, LOW CARB, LOW SUGAR, HIGH PROTEIN. Nutritionist-approved.