Mandi Knowles, RDN · Senior Director of Research & Development, Wellina
Published: September 1, 2026 · Last reviewed: September 18, 2026
Hunger isn't willpower. It's a set of hormonal signals: ghrelin telling you to eat, leptin and GLP-1 telling you you've had enough, and those signals respond to what you eat, how you sleep, and how much you move.
That's useful, because it means hunger is something you can influence rather than just endure. Here's how the main hunger hormones work, and seven evidence-based ways to work with them.
Understanding hunger hormones
Your body regulates appetite through several hormones, each doing a different job.
Ghrelin is the hunger hormone. Produced mainly in the stomach, it rises before meals and signals that it's time to eat.
Leptin is made by fat cells and does the opposite, it tells your brain you have enough stored energy. Over time, some people become less responsive to it.
GLP-1 and PYY are gut hormones released after eating. They slow digestion and increase fullness. GLP-1 is the same hormone that GLP-1 medications mimic.
Insulin regulates blood sugar. When blood sugar spikes and crashes, cravings often follow.
What you eat, how much you sleep, and how active you are all influence these signals. A few changes to your routine can shift them meaningfully.
1. Prioritize protein
Protein is the most reliable dietary lever you have. Research shows a high-protein meal increases GLP-1 and PYY, the hormones that tell your brain you've had enough, while lowering ghrelin.
Protein also helps stabilize blood sugar, preventing the crashes that drive cravings. If you often feel hungry again shortly after eating, protein is the first thing to look at.
Aim for 20 to 35 grams per meal and 10 to 20 grams per snack. Easy sources:
- Eggs
- Greek yogurt
- Chicken or turkey
- Fish
- Tofu or tempeh
- Beans and lentils
If you struggle to hit those numbers, a protein shake or bar helps, and our high-protein meal plans build the protein in for you.
2. Eat more fiber
Fiber slows digestion and steadies blood sugar. But the two types behave differently.
Soluble fiber — oats, bananas, asparagus, beans which may lower ghrelin and increase satiety hormones.
Insoluble fiber — whole grains, vegetables that supports digestion but has mixed effects on hunger specifically.
Aim for 25 to 35 grams a day, and weight it toward soluble fiber at the times you tend to get hungriest. A banana with peanut butter mid-afternoon, oatmeal at breakfast, beans added to soups and chilis.
One caution: increase fiber gradually. Going from 10 grams to 30 overnight tends to produce bloating rather than satiety.
3. Get enough sleep
One bad night is enough to shift your hunger hormones. Ghrelin rises, leptin falls, and you're hungrier the next day with less capacity to feel full.
Poor sleep also affects blood sugar, driving insulin resistance and cravings particularly for high-carb, high-fat foods. Research shows a single night of poor sleep is enough to increase how much you eat the following day.
Most adults need seven to nine hours. The habits that help most: a consistent bedtime, less screen time in the hour before bed, and a cool, dark room.
4. Exercise regularly
There's a reason you're often less hungry after a workout. Exercise lowers ghrelin and raises GLP-1 and PYY.
Aerobic exercise like walking, running, and cycling appears to have the largest short-term effect on appetite. Strength training helps too, especially combined with cardio, and regular movement improves leptin sensitivity over time.
Next time a craving hits, a ten-minute walk is worth trying before the snack cupboard.
5. Choose healthy fats
Fat slows digestion, blunts blood sugar spikes and prompts the release of fullness hormones. Whether that translates directly into fewer cravings isn't fully settled, but fat also makes food more satisfying which matters on its own.
Good sources: avocados, nuts and seeds, fatty fish like salmon and sardines, olive oil.
A handful of nuts or a drizzle of olive oil is usually enough. Fat is calorie-dense, so this is a case where a small amount does the work.
6. Stay hydrated
Thirst is easy to mistake for hunger. If you're under-drinking, you may be snacking to solve a problem water would fix.
Starting a meal with a glass of water has been shown to reduce calorie intake. Herbal teas and water-rich foods like cucumber and watermelon count toward your intake too.
A reasonable target is 64 ounces a day, more if you're active or it's hot.
7. Consider targeted supplements
The evidence here is thinner than for the six strategies above, and supplements are best thought of as a possible addition rather than a substitute. A few have interesting research:
Berberine, a plant compound that may improve blood sugar management and increase GLP-1.
Psyllium husk, a soluble fiber that may slow digestion and extend fullness, essentially a concentrated version of strategy two.
Magnesium and zinc, which may help with blood sugar management.
Check with a healthcare provider before starting any supplement, particularly if you take medication. Berberine in particular can interact with diabetes medications and blood thinners.
What about "food noise"?
You may have heard the term. It's the persistent, intrusive thinking about food that goes beyond physical hunger. It became widely used as people on GLP-1 medications described what those drugs quieted.
Food noise isn't a clinical diagnosis, but it describes something real, and the strategies above address it indirectly: steadier blood sugar, adequate protein, and enough sleep all reduce how often food comes to mind. If it's persistent and distressing, it's worth discussing with a healthcare provider or a dietitian. And if you're taking or considering a GLP-1, our guide to eating well on these medications covers the nutrition side in detail.
Frequently asked questions
What are hunger hormones?
Ghrelin signals hunger, leptin signals that you have enough stored energy, and GLP-1 and PYY are released after eating to slow digestion and increase fullness. Insulin regulates blood sugar, and its fluctuations influence cravings.
How can I lower ghrelin naturally?
Eating enough protein, getting adequate soluble fiber, sleeping seven to nine hours, and exercising regularly have all been shown to reduce ghrelin. Poor sleep raises it, which is why hunger tends to spike after a bad night.
How can I increase GLP-1 naturally?
High-protein meals raise GLP-1, as does exercise, particularly aerobic activity. Soluble fiber and some healthy fats also prompt its release. These are the same signals GLP-1 medications amplify pharmacologically.
How much protein do I need to control hunger?
Aim for 20 to 35 grams per meal and 10 to 20 grams per snack. Spreading protein evenly across the day works better for appetite control than concentrating most of it at dinner.
Does drinking water reduce hunger?
It can help. Thirst is often mistaken for hunger, and drinking a glass of water before a meal has been shown to reduce calorie intake. It isn't a substitute for eating enough, but it removes a common source of confusion.
Does poor sleep make you hungrier?
Yes. A single night of poor sleep raises ghrelin, lowers leptin, and increases how much you eat the following day with cravings skewing toward high-carb, high-fat foods.
What is food noise?
It's the informal term for persistent, intrusive thoughts about food beyond physical hunger. It isn't a clinical diagnosis, but steady blood sugar, adequate protein and sufficient sleep tend to reduce it.
The bottom line
Hunger responds to what you do. Protein and fiber at every meal, seven to nine hours of sleep, regular movement, and enough water. None of it is dramatic, and all of it shifts the hormonal signals that decide how hungry you feel.
Start with whichever one you're furthest from. For most people that's protein or sleep, and both tend to make the others easier.
Wellina's high-protein meals and snacks are built around exactly this — protein and fiber in portions that keep you full, ready in minutes.
About the author
Mandi Knowles is a Registered Dietitian Nutritionist and Senior Director of Research & Development at Nutrisystem, where she leads nutrition standards for Wellina.
This article is for general information and is not medical advice. Talk to your doctor or a registered dietitian before starting a supplement or making significant changes to how you eat, particularly if you take medication.
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