Oatmeal, for instance, whether “stone-ground,” Irish, or slow-cooked, will cause blood sugar to skyrocket. No diet should be dominated by any of these grains, nor do you need them. But most people can do fine by ingesting these grains in modest quantities (e.g., ¼ to ½ cup). The exception: If you have proven gluten sensitivity, then you must meticulously avoid rye, barley, bulgur, triticale, kamut, and perhaps oats.
