Fiber and water: the two habits nobody brags about
Nobody posts about fiber. But if there's a habit that quietly decides how comfortable your next few weeks feel, this is it.
Why it comes up on treatment
GLP-1 treatment slows down how fast your stomach empties - that's part of how it keeps you full longer. The trade-off is that digestion slows too, and constipation is one of the more common early complaints. It's manageable, and it's mostly preventable with two things you already have access to: fiber and fluids.
What actually helps
A multidisciplinary clinical consensus on managing GLP-1 side effects gives clear, unfussy guidance for constipation: get enough dietary fiber, drink generous fluids, and move your body. And the broader evidence backs the fiber piece - a large review of randomized trials found that fiber supplementation reliably improved stool frequency and consistency, with psyllium (think Metamucil-type soluble fiber) among the most effective.
Practical version:
A vegetable or a piece of fruit at every meal. Beans, berries, oats, leafy greens all count.
A daily fiber supplement (psyllium is a well-studied option) if food alone isn't getting you there.
Water throughout the day, in small frequent sips rather than one big glass. On a smaller appetite, sipping steadily is easier on your stomach.
One note: if you're dealing with the opposite problem - loose stools - ease off the fiber temporarily and reintroduce it slowly. Same guidance, run in reverse.
Why this is really about dose increases
Here's the part that matters for the long game. Every dose step-up asks a little more of your digestion. Going into each increase already hydrated and regular means your body absorbs the change smoothly instead of feeling it. Fiber and water aren't side quests - they're how you prepare your body to handle more.
The bottom line
A veggie or fruit at every meal, steady water all day, and a fiber supplement if you need one. Boring on paper. But it's a real part of what lets each dose increase feel like a non-event.
The science
Gorgojo-Martínez JJ, et al. Clinical Recommendations to Manage Gastrointestinal Adverse Events in Patients Treated with GLP-1 Receptor Agonists: A Multidisciplinary Expert Consensus. Journal of Clinical Medicine, 2022. https://pmc.ncbi.nlm.nih.gov/articles/PMC9821052/
van der Schoot A, et al. The Effect of Fiber Supplementation on Chronic Constipation in Adults: An Updated Systematic Review and Meta-Analysis of RCTs. American Journal of Clinical Nutrition, 2022. https://pmc.ncbi.nlm.nih.gov/articles/PMC9535527/
Medical disclaimer: This article is for general educational purposes only and is not medical advice. It is not a substitute for professional diagnosis, treatment, or the guidance of your Vea Health clinician or another qualified healthcare provider. Do not start, stop, or change any treatment, medication, dose, diet, supplement, or exercise routine based on this content without consulting your care team. Individual results vary, and nothing here is a guarantee of any particular outcome. Prescription treatments are available only if a Vea-affiliated clinician determines they are appropriate for you. If you think you are experiencing a medical emergency, call 911 or your local emergency number. Ongoing GI discomfort? Reply to any message and our care team can help you adjust.