Why We Get Hungry

Ghrelin and Leptin

Two main hormones regulate hunger: ghrelin and leptin. Ghrelin is produced by the stomach and signals the brain when the body needs food. Leptin is produced by fat cells and signals the brain when the body has enough fat stores.

When ghrelin levels rise, we feel hungry. When leptin levels rise, we feel full.

Other Factors That Affect Hunger

In addition to ghrelin and leptin, several other factors can affect hunger, including:

- Blood sugar levels: When blood sugar levels drop, we may feel hungry.

- Stress: Stress can lead to increased levels of cortisol, a hormone that can increase appetite.

- Lack of sleep: When we don't get enough sleep, our bodies produce more ghrelin and less leptin, which can lead to increased hunger.

- Certain medications: Some medications, such as steroids and antidepressants, can cause increased hunger.

- Medical conditions: Some medical conditions, such as diabetes and thyroid problems, can affect hunger.

Hunger is a complex process

Hunger is a complex process that is regulated by several hormones and other factors. Understanding the factors that affect hunger can help us make healthier choices about what and when to eat.