GLP-1 constipation: the gentle fixes naturopaths start with
Constipation is one of the most common side effects reported in GLP-1 trials, alongside nausea. The same slowed stomach and gut movement that keeps you full also slows everything downstream, and eating less food (and often less fiber and fluid) makes it worse.
Why it happens
GLP-1 medications slow gastric emptying and gut transit. Smaller meals mean less bulk. Many people also drink less because they simply feel full. All three push in the same direction.
The usual first steps
- Fluid first. Fiber without water can make constipation worse. Many clinicians suggest spreading fluid through the day rather than drinking large amounts at meals, which can worsen fullness.
- Fiber, slowly. Add soluble fiber (oats, chia, ground flax, psyllium, cooked vegetables) gradually over a couple of weeks. A sudden jump causes gas and bloating.
- Magnesium. Magnesium citrate or oxide draws water into the gut and is a common ND recommendation. It is not right for everyone, especially with kidney disease, so check with your clinician first.
- Movement after meals. A ten-minute walk after eating supports gut motility.
- A daily rhythm. Same time each morning, unhurried, with feet supported on a small stool.
- Prunes and kiwifruit. Both have trial evidence for improving stool frequency and are easy to add.
When to call your clinician
No bowel movement for several days, severe abdominal pain or swelling, vomiting, or blood in the stool need prompt medical attention. Severe or persistent symptoms can also mean the dose needs to change, which only your prescriber can decide.
Safety information
GLP-1 medications are prescription drugs with risks including nausea, vomiting, pancreatitis, gallbladder disease, and a boxed warning for thyroid C-cell tumors in rodents. Compounded versions are not FDA-approved. Supplements can interact with medications; clear them with a licensed clinician.
Sources
- pubmed.ncbi.nlm.nih.gov/?term=semaglutide+constipation+gastrointestinal+adverse+events
- pubmed.ncbi.nlm.nih.gov/?term=magnesium+oxide+constipation+randomized
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