In short
Flatulence appears in GLP-1 label tables and usually reflects slower digestion and diet changes. It is more embarrassing than harmful for most people.
How common it is on each medicine
Label rates vs placebo
Why it happens
When food moves slowly, gut bacteria have more time to ferment it, which makes gas. Changes in gut movement can also make you notice it more.
Beans, lentils, cruciferous vegetables, sugar alcohols and some protein powders are known gas producers, and people often eat more of them on a GLP-1 plan.
When it starts and fades
Gas tends to show up in the first weeks and after dose steps, along with other stomach effects that were mostly mild to moderate in trials.
It can also rise any time you change your diet quickly, such as adding a lot of fiber at once.
What helps
- Add fiber-rich foods slowly over 1 to 2 weeks.
- Try a different protein powder if one seems to trigger gas.
- Limit sugar alcohols like sorbitol, xylitol and maltitol.
- Eat slowly and avoid fizzy drinks.
- Walk after meals to help gas move.
Related side effects
Read next
Common questions
Is gas a side effect of Wegovy?
Yes, flatulence is listed among the label's reported reactions. It is usually mild.
What foods cause the most gas on a GLP-1?
Beans, lentils, broccoli, cabbage, onions, sugar alcohols and some protein powders are common culprits. Everyone reacts a little differently.
Will gas get better over time?
For many people it eases after the step-up phase and once fiber is increased gradually.
Sources
Clinician review pending. Drafted from primary sources and waiting for sign-off by a licensed clinician (MD, DO or PharmD) before launch. Every number is checked against its source. Drug facts are re-checked quarterly, prices monthly and whenever a label changes. How we review · Report an error