thinkThin Protein & Fiber Bar S'mores. Naturally Flavored. Protein & Fiber Bar. 150 Calories. 10g Protein. 5g Fiber. 5g Sugar Per Serving. Finding nutritous, 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. GMO* Free. Certified Gluten Free. GF. By GFCO. *All ingredients have been produced without the use of genetic engineering. 866.98THINK. www.thinkproducts.com. thinkThin®