I think it has a lot more to do with choices than with willpower/honesty. If you choose to not have desirable food in your household, it is much easier to eat

I think it has a lot more to do with choices than with willpower/honesty. If you choose to not have desirable food in your household, it is much easier to eat less. You won't have to strain your willpower or lie to yourself. If everyone went to the grocery store and bought eggs for breakfast and brown rice + tuna for dinner with no oil, they would be just fine.