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PEPTIDES - GLP-1s & Gut Health: What You Need to Know (Especially with IBD)

Posted: 19th May 2025

PEPTIDES - GLP-1s & Gut Health: What You Need to Know (Especially with IBD)

GLP-1 receptor agonists like semaglutide (Ozempic, Wegovy) and liraglutide have become popular in recent years — mainly for their use in diabetes management and weight loss. But if you’ve been diagnosed with a gut condition like ulcerative colitis or Crohn’s disease, you might be wondering…

Can GLP-1s actually support gut healing?
Or do they make things worse?

Let’s break down the science — in plain English.


???? What are GLP-1s?

GLP-1s (Glucagon-Like Peptide-1 receptor agonists) are medications that mimic a hormone your body naturally produces in the gut. This hormone plays a key role in regulating blood sugar, appetite, and gut motility.

Originally designed for type 2 diabetes, GLP-1s slow gastric emptying, increase insulin sensitivity, and reduce appetite. But newer research is showing that these drugs may also have anti-inflammatory and gut-protective effects — especially relevant to those living with chronic inflammatory bowel diseases (IBD) like UC and Crohn’s.


✅ Potential Benefits for IBD

Although human trials are still in early stages, some promising findings have come from animal models and early clinical studies:

1. Reduction in gut inflammation

GLP-1s have been shown to downregulate pro-inflammatory cytokines like TNF-α and IL-6, which play a major role in UC flare-ups.

2. Support for gut barrier function

They help tighten up the intestinal lining, reducing permeability and the risk of “leaky gut” — a common feature of IBD.

3. Mucosal healing

Several studies suggest GLP-1s can promote mucosal repair, which is essential for long-term healing.

4. Improved gut-brain signalling

Because GLP-1s impact the gut-brain axis, they may help reduce visceral hypersensitivity, gut discomfort, and even mood symptoms tied to IBD.


???? What the research says

  • Zhou et al. (2019) found that GLP-1 treatment reduced inflammation and improved mucosal healing in colitis-induced mice.
  • Yusta et al. (2015) showed that GLP-1 receptor signalling supported barrier integrity and immune regulation in inflamed gut tissue.
  • Wang et al. (2020) noted reductions in oxidative stress and pro-inflammatory markers in colitis models after GLP-1 therapy.


⚠️ Things to Watch Out For

GLP-1s are not without their limitations — especially when used without a supportive lifestyle or in sensitive individuals.

  • Appetite suppression: This can lead to under-eating, especially protein, which is essential for gut repair. Always monitor your nutrient intake.
  • Delayed gastric emptying: While this is beneficial for blood sugar, it can exacerbate bloating or reflux in some people with IBD.
  • Constipation: GLP-1s can slow motility, which isn’t ideal if you already struggle with sluggish digestion.

And importantly — they do not heal the root cause.

GLP-1s may reduce inflammation, but they don’t repair trauma, regulate the nervous system, or rebuild your gut lining.
They are a tool — not the foundation.


???? The Bottom Line

If you’re using GLP-1s alongside:

  • Targeted nutrition
  • Nervous system regulation
  • Somatic healing + journaling
  • Evidence-based supplementation

…then you may benefit from their inflammation-reducing effects without relying on them as your main solution.

Healing from IBD isn’t about quick fixes. It’s about building a body that doesn’t need medications just to function — and you’re doing that, one layer at a time.


Book your 1 hour Peptide consultation here




Katie - KLK Nutrition

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