I guess it's simpler to get at what I'm getting at more directly: Look into iodine deficiency, and see if that could be a cause. -Especially- if you have strong negative reactions to high-carbohydrate foods, as reactive hypoglycemia is one of the less common symptoms. (It's one I get, actually, which is why I'm aware of it; white rice knocks me out of commission when I haven't been taking regular iodine supplements.)