The 150 calories. 10 g protein. 5 g fiber. 5 g sugar. Finding nutritious delicious snacks on the go was always a challenge for me so I created think Thin Protein Bars. With think Thin Lean Protein & Fiber bars my goal was to create a bar with the perfect balance of protein and fiber to help keep you full and satisfied - all for 150 calories. Plus each bar is gluten free and made with 100% non-GMO ingredients.