What is gluten? Gluten is a protein found in wheat, rye, barley and possibly oats. Millions of people around the world are turning to a gluten-free diet. For over 2 years, Glutino has been committed to helping these people enjoy a delicious lifestyle. At Glutino, safety is the #1 concern! Glutino supplies top quality, great tasting breads, bagels, pretzels, cookies, crackers and more!