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What is ghrelin?

Ghrelin is a hormone that tells your brain that you're hungry. When you don't sleep well, more of this hormone is produced, causing your brain to keep getting the message that you need to eat. That's why researchers link obesity to sleep deficiency

Marjorie Nolan Cohn
Nutrition & Dietetics

Ghrelin is your primary hunger hormone. It is released from your stomach lining when you are hungry. It then circulates through your blood to your brain to alert you to your physical hunger. It has many functions throughout your body besides hunger. It also functions within the pleasure/reward center of the brain, plays a role in memory formation, immune function, and even sleep.

Mr. Eliot LeBow, CDE, LCSW
Endocrinology Diabetes & Metabolism

Ghrelin is a hormone that gets released by the stomach to communicate the message to the brain that it is time to eat. At that point, the hypothalamus section of the brain releases neuropeptides, which trigger hunger. This part of hunger is a type of biochemical reaction that allows a person to desire or crave for food. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.