This happened to me too. This past winter I didn't have a single cold, sinus infection, bout of flu, or bronchitis. In the past I would have had at least three incidents of one or more of these. Being grain-free has truly helped.
When I stopped eating wheat, I stopped having 7 or 8 sinus infections + 2-3 bouts of bronchitis every winter.
I'm hoping to make it through allergy season with much less pain this year as well. I am doing some preventative work on that, which I hope combined with being grain-free, will allow me to breathe through the spring.
Food should be fun--Thomas Keller