Well, how much can you dilute gasoline with camel pee and the car will still run? Will it run well?
The biggest thing though, even at low levels grains are ghouls for appetite increases, so cutting them out in the 'all' way is the fastest track to happiness. Throw away baby leftovers. Baby is full. You don't need them. Throwing food away is liberating. Nobody needs emergency cereal bar. Go for an emergency boiled egg or sardines. Honestly, if you are not gonna eat a boiled egg, you are not hungry and do not need a snack.