Appetite and Satiety
The signals that make you feel hungry and full, and what changes them.
Last revised
Key takeaways
- Most satiating macronutrient: protein
- Fibre: adds volume and slows gastric emptying
- Most useful single change: Put protein and fibre in every meal.
- Commonest mistake: Relying on very low-volume, energy-dense meals.
- See a doctor if any of the signs under "When to get help" below apply to you.
Why it matters
Foods differ substantially in how filling they are per calorie, which matters more day to day than willpower does.
The numbers, in one place
| Measure | Figure |
|---|---|
| Most satiating macronutrient | protein |
| Fibre | adds volume and slows gastric emptying |
| Energy density | lower-density foods fill you on fewer calories |
| Liquid calories | less satiating than the same energy eaten |
| Sleep restriction | associated with increased appetite |
What helps
- Put protein and fibre in every meal
- Choose foods with high water content, such as soups and vegetables
- Drink water rather than calorie-containing drinks
- Protect sleep, which affects appetite regulation
What to avoid
- Relying on very low-volume, energy-dense meals
- Treating hunger as something to be defeated rather than managed
- Long gaps that leave you ravenous at the next meal
Where to go next
- Making Sense of Appetite and Satiety
- The Appetite and Satiety Checklist: What to Do and What to Skip
- What the Guidance Really Says About Fad Diets
- The Evidence on Weight and Mental Health, Without the Hype
When to get help
See a GP for a persistent loss of appetite with weight loss, or for constant hunger with thirst and frequent urination, which can indicate diabetes. Some medicines alter appetite substantially and are worth reviewing.
Where this comes from
- British Dietetic Association — appetite and satiety
- NHS — The Eatwell Guide
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.