From my experience, it takes husbands a while to get on board. Mine was still eating cold cereal--and a BIG bowl, thereof--along with lots of rice, bread, etc, when I went strict on my LCHF. Now, he rarely eats cereal, will have maybe one piece of bread a day, and occasionally, but not often, wants rice or potatoes with his dinner.

But it's taken many months. The grains are still hanging around, and I've been grain free for over two years.