thinkThin® Protein & Fiber Bar Chunky Chocolate Peanut. 150 Calories. 10g protein. 5g fiber. 5g sugar per serving. Finding nutritious, delicious snacks on the go was always a challenge for me, so I created ThinkThin® protein & fiber bars. With ThinkThin® protein & fiber bars, my goal was to create a bar with a wonderful 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. To your vitality. Lizanne (Founder of ThinkThin®). 866.98THINK. www.thinkproducts.com. Certified GF, gluten-free by GFCO.