It is an important energy store in the body - if we eat more food than we need, the body changes it into storage fat. (rehydrate.org)
As farmers produced more food than they needed for their own families, cities came into existence. (religion-online.org)
Most people eat more than they need, or buy more food than they need because they are nutritionally starving no matter how much they eat. (evolvingwellness.com)