Constipation is one of the most common complaints people bring up on a GLP-1 — and fiber is usually the first thing that comes up as a way to stay regular. This is a simple guide to high-fiber foods that fit the smaller, protein-focused meals you are probably already eating.
Why fiber comes up so often on GLP-1s
GLP-1 medications slow digestion, which is great for feeling full but can leave things moving more slowly than you would like. Fiber adds bulk and helps keep you regular. It also has a bonus: fiber-rich foods add substance to smaller meals, so you feel more satisfied while eating less.
High-fiber foods worth keeping on hand
These are easy, everyday sources of fiber:
- Raspberries & blackberries
- Apples (with skin)
- Pears
- Lentils
- Black beans & chickpeas
- Oats
- Chia seeds
- Ground flaxseed
- Leafy greens
- Broccoli
- Avocado
- Whole grains
How to add fiber without the bloating
The most common mistake is going from very little fiber to a lot overnight. That is what causes gas and bloating. Instead:
- Start small. Add one fiber-rich food at a time.
- Build up over a week or two, not in a single day.
- Drink more water as you go. Fiber works best with fluid — without it, more fiber can actually make things worse.
The fiber-plus-water combination
Fiber and hydration work as a team. A common target people aim for is 80+ ounces of water a day, especially since eating less can quietly mean drinking less. Keeping a water bottle in sight is a simple way to stay ahead of it.
Easy high-fiber additions to meals you already eat
- Stir a spoonful of chia or ground flax into oatmeal or yogurt.
- Add black beans or chickpeas to a small salad or soup.
- Keep berries on hand as an easy, fiber-rich snack or topping.
- Choose whole grains over refined ones when it is easy to.