“Hi all… what can I take to get my bowels moving?”
This is one of the most common questions we receive in the first weeks after gastric sleeve surgery — especially from our patients in New Zealand and Australia.
So, is it normal?
Why does the body react like this?
Should you worry?
In this guide, we explain everything clearly, drawing on insights from Assoc. Prof. Dr Ozan Şen and evidence-based recommendations from Dietitian Cemre Yamaner.
Your digestive system goes through a temporary adaptation period. During this time, both constipation and diarrhoea can happen, and both are usually normal.
Your intestines move according to the amount of food entering them.
Less volume = slower movement.
During the liquid and purée stages, fiber intake is extremely limited.
This is one of the biggest causes of constipation.
With a smaller stomach, drinking water becomes more difficult.
Dehydration immediately slows bowel movement.
Protein is the priority in the first weeks.
Low fiber + high protein = constipation.
Rapid weight loss and sudden dietary changes affect the gut flora.
Constipation is very common
Some patients experience diarrhea due to protein shakes
Reduced water intake worsens constipation
The digestive system begins adjusting
Mild to moderate constipation may continue
Fiber intake increases
Bowel movements normalize gradually
The digestive system settles into its new rhythm
Persistent issues should be reviewed with your doctor or dietitian
“It is completely normal to experience irregular bowel movements for 2–8 weeks after gastric sleeve surgery.Constipation is more common, but some patients may have diarrhea due to liquid proteins.
If symptoms last longer, we assess hydration, fiber intake, vitamin-mineral supplements, and the overall clinical picture.”
Dietitian Cemre Yamaner provides practical, safe and effective solutions for post-op constipation and bowel sluggishness:
Consume one serving every day.
Pectin helps regulate bowel movement naturally.
Best taken in the morning on an empty stomach.
Small stomach = small sips.
Frequent small sips throughout the day are essential.
Helps soften stool and regulate bowel movement.
Safe for post-op patients.
Even 5–10 minutes of light walking stimulates the intestines.
Puréed or soft vegetables work perfectly in early phases.
Yes — especially in the first 1–2 weeks.
Possible reasons:
No — in most cases, it is completely normal.
Your body is learning a new rhythm.
With:
✔ adequate fluids
✔ balanced nutrition
✔ movement
✔ support from your medical team
your bowel movements will usually normalize within 6–8 weeks.
💬 Ready to Learn the Facts About Gastric Sleeve?
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Sarah, 38, Christchurch, New Zealand
"Before my gastric sleeve surgery with &New Me, I struggled with obesity-related health issues. Now, I’ve lost 40 kg, and my diabetes is under control. I finally feel like myself again."
Michael, 45, Sydney, Australia
"I hesitated for years, but &New Me gave me confidence. I lost 50 kg post-surgery, and my energy levels have skyrocketed!"