Gluten-containing grains
Gluten is found in various grains, like wheat, barley, rye, triticale, farina, spelt, kamut, wheat berries, farro, and couscous. Despite oats being inherently gluten-free, cross-contamination during processing might introduce traces of gluten.
Therefore, there are not many gluten-free options when it comes to grain. You have to be quite picky when selecting grains. Go with grains like corn, rice, and oats.
Certain Condiments
Surprisingly, several commonly used condiments house hidden gluten. This includes soy sauce, barbecue sauce, salad dressings, marinades, cream sauces, spice blends, gravy mixes, malt vinegar, and ketchup. Crafting condiments from certified gluten-free ingredients or purchasing certified gluten-free options provides safer alternatives. [2]