The Secret to Healthy Eating

I think that a lot of people would just eat to get full and they wouldn't actually eat anything healthy. People in like American soldiers and being on the jungle, they would eat dirt and tree bark. So that way their stomachs wouldn't rumble because it would give them away. But if you crave it though, it's called pica and you're probably iron deficient. Pica is for some reason like if you have an iron deficiency, it makes your body crave different things.