When I tell people that gluten sensitivity represents one of the greatest and most under-recognized health threat to humanity, the response I hear is pretty much the same: “You can’t be serious. Not everyone is sensitive to gluten.

Should be “threats” not “threat”

Perlmutter, David (2013-09-17). Grain Brain: The Surprising Truth about Wheat, Carbs,  and Sugar – Your Brain’s Silent Killers (Kindle Locations 404-405). Little, Brown and Company. Kindle Edition.