People with celiac disease are sensitive to gluten, which is a protein found in wheat.
Less than 1% of the American population has even the mildest form of this disease, but at least 20% of SWPLs think they have this disease and demand gluten-free products.
Wheat can be processed to remove the gluten, which is why you see stuff like gluten-free bread in SWPL health food stores, but eating gluten-free products if you don’t have celiac disease is stupid, because you are removing the protein from the wheat, and you need protein to live. Gluten is a completely harmless source of nutrition for 99% of Americans.
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If you think you might have celiac disease, you should NOT just stop eating gluten, you should go to gastroenterologist and get a diagnosis. There's a fairly accurate blood test.