3. Meat substitutes
Manufacturers use gluten as a food binder. The substance is gluey and you can often find it in veggie burgers, seitan and other faux meat products. You can replace the mentioned meats with tempeh or tofu if they do not have added fillers.
4. Pickles
Your favorite pickles can contain malt vinegar. This kind of vinegar is made from barley which means that there is gluten. Opt for a gluten-free version of pickles then.