This equation is fine, no one doubts it. The issue is why do people who have enough fat stores to last them months get hungry, and why does hunger feel like physical pain. And given these facts why does standard govermnent advice recommend that we constantly eat. I think two meals a day should be the max, and a glance at cereal sugar content makes breakfast the obvious one to drop. I followed this and it reduced my calorie intake and weight (lost 20kg over a couple of years).