Larazotide acetate (AT-1001) is an 8-amino acid synthetic peptide that regulates intestinal tight junctions. Originally developed for celiac disease, it prevents zonulin-induced intestinal permeability (leaky gut). It works locally in the gut and is not systemically absorbed, making it very safe.
Quickstart Highlights
- Dosage: 0.25-1mg
- Frequency: 3x daily with meals
- Administration: Oral (capsule or solution)
- Cycle length: 8-12 weeks or as needed
Dosing Plan
| Weeks | Dose | Units |
|---|---|---|
| Standard plan | 0.5mg 3x daily before meals | 1.5mg total daily |
| Conservative Start | 0.25mg 3x daily | 0.75mg total daily |
| Higher Dose (if needed) | 1mg 3x daily | 3mg total daily |
How This Works
Larazotide is a synthetic peptide derived from the zonula occludens toxin (ZOT) of Vibrio cholerae. It competitively inhibits zonulin binding to intestinal epithelial receptors, preventing the opening of tight junctions between intestinal cells. This maintains the integrity of the intestinal barrier and prevents antigens (like gluten peptides) from crossing into the bloodstream and triggering immune responses.
Mechanism of Action
How Larazotide Works in Your Body
Peptide Administered
Enters the bloodstream via injection
Receptor Binding
Finds and activates its target receptor
Signal Cascade
Triggers a chain of cellular responses
Biological Effect
The body produces the desired outcome
Benefits & Side Effects
Potential Benefits
- Maintains intestinal tight junction integrity
- Reduces gluten-induced symptoms in celiac disease
- May help with non-celiac gluten sensitivity
- Supports gut barrier function (leaky gut)
- Reduces intestinal permeability
- Very safe (not systemically absorbed)
Potential Side Effects
- Generally very well-tolerated
- Mild GI symptoms (transient)
- Headache (rare)
- Not systemically absorbed - minimal systemic effects
Good to know
- Oral peptide - taken as a capsule or solution before meals.
- Works locally in the GI tract - not systemically absorbed.
- Prevents zonulin-induced opening of tight junctions.
- Originally developed for celiac disease (Phase 3 trials).
- May help with gluten sensitivity and leaky gut syndrome.
- Very safe due to lack of systemic absorption.
- Take 15-30 minutes before meals for best effect.
- Can be used long-term as a gut barrier support.
Community Insights
Summarised from 3 sourcesLarazotide acetate (AT-1001) is an 8-amino acid synthetic peptide that regulates intestinal tight junctions. Originally developed for celiac disease, it prevents zonulin-induced intestinal permeability (leaky gut). It works locally in the gut and is not systemically absorbed, making it very safe. Or
Common Dosages Reported
- 0.25-1mg 3x daily with meals
- Standard protocol dosing
Side Effects Mentioned
- Generally mild, individual variation expected
- See full guide for detailed safety info
Stacking Suggestions
- Consult research and healthcare provider before stacking
What people are saying
Results vary based on individual response
Consistent dosing and timing important
Reviews & Discussion
Real experiences shared by the community — not medical advice.
Interest in Larazotide for food sensitivities and gut issues
A user with severe neurological disease and significant gut issues reported interest in Larazotide after seeing others on the forum provide positive feedback regarding its effectiveness for food sensitivities. The user noted that they currently struggle to eat most foods and are looking to the peptide as a potential solution for their digestive distress.
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