How to eat in your first month on a GLP-1
Smaller plates, steady protein, plenty of fluid, and a plan for the two side effects that bother people most.
Why eating feels different
On a GLP-1 medicine your stomach empties more slowly and your brain gets the "I'm full" message sooner. That's the point, but it means the way you ate before may suddenly feel like too much. Eating the same size meal at the same speed is the most common reason people feel sick in the first weeks.
The goal for month one isn't a perfect diet. It's learning your new hunger signals, getting enough protein and fluid, and keeping side effects small.
Start smaller, and slow down
- Use a smaller plate or bowl. A salad plate makes a satisfying portion look like a meal.
- Eat slowly. Put your fork down between bites and aim for 20 minutes per meal.
- Stop at "comfortably satisfied". On this medicine, the jump from satisfied to uncomfortably full can be quick.
- Don't skip meals all day and eat late. Three small meals and a snack usually feel better than one big one.
Protein first, every time
When you're eating less, what you eat matters more. Start each meal with the protein on your plate: fish, chicken, eggs, tofu, Greek yogurt, beans. Protein helps protect your muscle while you lose weight and keeps you full longer. Our protein guide has numbers and easy swaps.
Fluids and fibre
Many people drink less without noticing, because the medicine quiets thirst along with hunger. Dehydration can make nausea and constipation worse, and in more serious cases can strain the kidneys.
- Aim for about 8 cups (64 oz) of fluid a day unless your clinician has told you otherwise, more in the heat or after exercise.
- Sip through the day rather than drinking a lot at once, and go easy during meals.
- Add fibre slowly: vegetables, fruit, oats, beans and whole grains. A sudden jump can cause bloating.
A plan for nausea
Nausea is most common in the first days after starting and after each dose increase. These help many people:
- Eat bland, low-fat foods on bad days: rice, crackers, toast, bananas, broth, plain chicken.
- Limit greasy, fried and very sweet foods, especially in the two days after your injection.
- Go easy on fizzy drinks and alcohol.
- Try ginger tea, cold foods, or fresh air after eating. Don't lie down straight after a meal.
- Tell your coach. If nausea keeps you from eating or drinking, your clinician may hold your dose where it is for longer.
A plan for constipation
- Drink water steadily through the day.
- Add a fibre food at each meal, and move every day; even a 10-minute walk after dinner helps.
- Ask your care team before trying over-the-counter remedies, so they can suggest what fits you.
A sample day
| When | What |
|---|---|
| Breakfast | Two eggs scrambled with spinach, half a slice of toast, papaya |
| Lunch | Ahi or tofu poke on a small scoop of rice with extra cucumber and edamame |
| Snack | Plain Greek yogurt with a few berries |
| Dinner | Grilled chicken or fish, a palm-sized portion of sweet potato, a big side of vegetables |
Portions will be smaller than you're used to. That's expected. If you can't finish, eat the protein first.
When to call your clinician
- You can't keep fluids down for more than a day
- You have severe stomach pain, especially if it spreads to your back
- You feel dizzy, very weak, or are passing very little urine
- You notice signs of low blood sugar (shaky, sweaty, confused) and take diabetes medicine
For any severe or sudden symptoms, seek urgent care or call 911.
Educational only, not medical advice; a licensed clinician decides eligibility after your consultation. If you have severe symptoms, contact your clinician or call 911.