Gluten is a type of protein that is included in foods like flour, and this component can cause various problems to people who have allergies. Recently, campaign of having gluten-free foods started from USA and EUROPE. Gluten-free diets became popular across many people after famous celebrities joined this campaign. Famous model Miranda Kerr, said “I never eat white colored food (flour) because that is poison”. Kim Kardashian, who is admired by many women for her perfect body shape, said “Gluten-free diet is the best”. Then, is gluten really bad for our body? Gluten is a type of insoluble protein which presents in wheat, barley, rye and so on. Its molecule structure contains sugar and lipids, and it has effect of expanding leaven which could be used to maintain shape of bread and cookies while thickens and seasons foods. There are various foods contain gluten, including bread, pasta, cake, biscuit, assorted snacks, soup, syrup, salad dressing, sausag