system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - Our bodies signal us that we are hungry but we generally have a lot of energy stored as fat. Why is that? What is the hungry feeling is telling us in fact?
gpt
Hunger is triggered by the Hunger Hormone called Ghrelin. Ghrelin is produced by the body during times you usually eat. So if you always eat at 8am, 1pm, 6pm, you'll always feel hungry at those times.

When you eat, the food becomes short-term energy which lasts around 6-24 hours. Excess short-term energy not used is converted to long-term energy (fat). Since you're always refilling that short-term energy tank, your body doesnt need to use your long-term energy.