Not good for folks with Celiac Disease. The consumption of gluten-containing products in these patients can lead to various cancers and cardiomyopathies.
Gluten to people with celiac disease (intolerance to gluten) is worse than cancer. I am speaking from experience. My wife is a celiac. Gluten is contained in wheat, barley, oats, maltand rye along with being in other food stuffs as an ingredient including modified foodstarch and soy sauce among other. Try a diet that does not have these ingredients. When a trace of gluten is ingested by a celiac, it is equivalent to poison. Celiac disease is genetic. Out of my wife's family of seven (six girls and a boy) for four sisters have had intestinal surgery and the brother died at 23 with an intestine of an 80 year old. It was 10 years after his death than my wife was diagnosed after being told she had everthing from crones to addison. The only cure for celiacs is total avoidance of gluten. By the way potatos don't contain gluten.
If I had celiac disease, which is a very serious disease, I wouldn't eat at McDonald'd...it's just common sense.