Larazotide
An eight-amino-acid oral peptide that works right at the gut lining. People run it for leaky gut and barrier support, taken before meals to help keep the tight junctions between intestinal cells closed, often alongside BPC-157 or KPV in a gut-repair protocol.
Where to buy Larazotide.
We track Larazotide across vetted vendors, but none is publicly listing a verifiable price right now. As soon as one does, it shows up here, cheapest first.
Larazotide
No vetted vendor is publicly listing Larazotide at a price we can verify yet. We don't show prices we can't stand behind, so this stays empty until one does.
Compare Larazotide with other peptides →What Larazotide actually does.
The simple version first, then a little more for the curious. No biochem degree required.
It acts like a doorstop for the gut lining, helping the tiny junctions between intestinal cells stay shut so fewer unwanted particles slip through into the body.
How it works
Larazotide is a zonulin antagonist. Zonulin is the body's own signal that loosens the tight junctions between gut cells; Larazotide competes with it, helping those junctions stay closed and reducing how much passes through the gut wall.
Where it acts
It works locally, inside the gut, and is barely absorbed into the bloodstream. That gut-restricted action is the whole point: it sits in the intestinal lumen where the barrier problem is, rather than circulating body-wide.
What people notice
In celiac trials people reported fewer digestive symptoms on days they were exposed to gluten. Outside that setting, people run it for general leaky-gut and barrier support, with effects that build over weeks of consistent dosing.
Honest caveat: the real human data comes from celiac disease trials, where Larazotide met a Phase 2b endpoint but its Phase 3 study (CedLara) was discontinued in 2022 for failing to show a clear enough benefit. It was never approved as a medicine anywhere, and broader leaky-gut use is largely extrapolation. It is sold strictly for research use only. None of this is medical advice, talk to a licensed provider before starting anything.
How to take it.
Larazotide is taken orally, as a capsule, with no needles and no reconstitution. The timing is the key detail: it is meant to be taken shortly before meals so it is in place when food arrives. The routine is below; for more on cycling and stacks, see the full guide.
Take your dose
A common protocol is 0.5 mg (500 mcg) by mouth, three times a day. Swallow the capsule with a little water.
Time it before meals
Take each dose about 15 minutes before eating, so it is acting at the gut lining when food and any triggers arrive. This pre-meal timing is what the trials used.
Stay consistent
Keep to the same pre-meal pattern each day. Larazotide is not a single-dose fix; the effect builds over weeks of regular use.
Store it
Keep capsules in a cool, dry place out of direct light. No refrigeration or mixing required.
Typical Larazotide dose: about 0.5 mg (500 mcg) by mouth three times a day, each dose roughly 15 minutes before a meal. It is run as a daily course rather than a single dose, and there is no needle or mixing involved.
How to cycle Larazotide.
How long people run Larazotide, when to take a break, and the honest reasoning behind it.
Taken as a daily course, no cycling needed.
A cycle just means a defined run of time on the peptide. Larazotide was studied as a daily, ongoing therapy rather than something taken in short loading blocks, so people tend to run it as a steady daily course while they are working on gut symptoms.
Why not just run it forever? Mostly because the long-term human safety data does not exist outside the trial windows, and it never reached approval. The cautious approach is to run a defined course, reassess, and not assume indefinite use is fine.
- Hold the schedule at three pre-meal doses a day rather than skipping around.
- Reassess after a defined block instead of running it open-endedly, since long-term data is thin.
- Loop in a provider if gut symptoms are significant or persistent. Real gut disease deserves a real workup, not just a peptide.
Want the full picture, on and off periods, the washout, stacking, and keeping your results? Read how peptide cycling works →
What's actually in the vial.
We haven't yet found a vendor publishing a lab certificate for Larazotide that we can link to directly. We don't post purity numbers we can't source. When a vendor publishes a real Larazotide COA, it'll show up here.
What people pair it with.
Larazotide is a gut-barrier peptide, so the stacks that make sense are other gut-and-healing compounds rather than the injectable recovery blends.
Leaky-gut support
The pairing people reach for when the gut lining is the target. Larazotide helps keep the tight junctions closed from inside the lumen; BPC-157 is run for repair of the gut wall itself. Different angles on the same barrier.
View stack →Gut & inflammation
KPV is an anti-inflammatory tripeptide people run for the gut, so it stacks naturally with a barrier-focused peptide. One aims at the junctions, the other at calming inflammation in the same tissue.
View stack →Barrier, repair & calm
The all-in-on-the-gut option for people who want to cover barrier integrity, tissue repair, and inflammation at once. A step up from the two-peptide pairs above.
View stack →In the same corner.
Other gut and healing peptides people compare against or run alongside Larazotide.
Questions, answered straight.
Is Larazotide legal?
Larazotide is not an approved drug anywhere; its celiac development reached Phase 3 and was then discontinued. The vendors we compare offer it strictly for research use only, not as a supplement or medicine. It is not a known performance-enhancing substance, but rules vary by country, so check what applies where you are.
What does research use only actually mean?
It means the product is sold for laboratory and research purposes, not as a supplement or medicine for people. It has not been reviewed or approved for human use by the FDA. We aggregate prices and public lab data so you can see the landscape; what you do with that is between you and a licensed provider.
With or without food?
The protocol used in trials was to take each dose about 15 minutes before a meal, so it is in place when food arrives. That pre-meal timing is the whole idea behind how Larazotide is run, rather than taking it with or after eating.
Do I need to reconstitute or inject it?
No. Larazotide is an oral capsule. There is no bacteriostatic water, no syringe, and no injection sites. You swallow it before meals. That simplicity is one reason people find it approachable compared with injectable peptides.
How long until it works?
It is not a single-dose fix. In the celiac trials it was taken consistently three times a day, and any benefit built over weeks of regular dosing. Treat it as a daily course rather than something you feel right away.