She is closer to what we were designed for. It's not as if people were ordering a big Mac and large fries with a milkshake two or more times a day, a few hunded years ago.
We are designed to go days without food. We are designed to eat small amounts of natural things, and make them last a long time. A handfull of berries here, a chunck of meat there, a few nuts/seeds, etc.
We are certainly not designed to eat a full rack of ribs with a lobster tail and a platter of garlic butter shrimp! (Sounds good, though, doesn't it? lol) Especially day in and day out. The food we eat is killing us. North America is the best-fed continent in the world, and also the sickest.
Anyways, our bodies use up a majority of it's energy breaking down foods, separating the poisons and toxins from the vitamins and nutrients, and distributing it all throughout our body. A large majority of energy is used with the digestion/dispersion process. Well after you have eaten lunch, your body is still using energy to take care of breakfast. That's why animals that are wounded in the wilderness will go lay down and fast until they heal, only taking water.
Anyone can live like that. Anyone can do it. It just takes a mental commitment, and when you feel hungry, chug down some water, and the hunger-pangs will go away.