The hunger hormone ghrelin doesn’t seem to affect how the body burns fat vs. carbs after eating, how active someone is, how fit they are, or their eating habits like restraint or hunger feelings.

Women with more of the hunger hormone ghrelin tend to burn fewer calories at rest and after eating, even when you account for their body size and insulin levels.

People with more belly fat and metabolic issues tend to have lower levels of a hunger hormone called ghrelin, which is linked to higher fat in the liver, more leptin (a fullness hormone), and higher blood pressure.

Women with more ghrelin — the hunger hormone — actually eat less each day, which seems surprising but was observed in this group.

After following diets for 18 months, men's hunger hormone levels went up slightly while women's went down, showing a clear gender difference in how the body responds to dieting.

In men with excess belly fat and metabolic issues, a rise in hunger hormone levels was linked to better blood sugar control, higher 'good' cholesterol, and reduced belly fat, even after accounting for how much weight they lost.