Ghrelin
The "hunger hormone," released by the stomach before meals to stimulate appetite and drive food-seeking; it falls after eating. Poor sleep raises it.
Too little may be associated with
Reduced appetite.
Too much may be associated with
Increased hunger and calorie intake; elevated by sleep deprivation and dieting.
Informational only — not medical advice.
Organ systems
Stimuli that influence it
Substances
- Glucomannan (↓)
- Psyllium husk (↓)
- Whey protein (↓)
Behaviors
Functions
Dysfunctions
Research (6)
- Hypothalamic Dysfunction Casipit et al. (2026) PubMed ↗
- Mechanistic Insights into the Link between Gut Dysbiosis and Major Depression: An Extensive Review Sonali et al. (2022) Full text ↗ PubMed ↗
- Ghrelin and food reward Al et al. (2019) Full text ↗ PubMed ↗
- Effects of a low carbohydrate diet on energy expenditure during weight loss maintenance: randomized trial David (2018) Full text ↗ PubMed ↗
- Sarcopenic obesity in older adults: aetiology, epidemiology and treatment strategies Batsis et al. (2018) PubMed ↗
- [Ghrelin: beyond hunger regulation] Milke (2005) PubMed ↗
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