Finding nutritious, delicious snacks on the go was always a challenge for me so I created thinkThin Protein bars Think Products Finding nutritious, delicious snacks on the go was always a challenge for me so I created thinkThin Protein bars. With thinkThin 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.