Larazotide

An eight-amino-acid peptide that acts as a zonulin antagonist, helping regulate tight-junction proteins in the intestinal epithelium to reduce gut permeability.

Mechanism of action from published research — how the molecule behaves, not a claim about any product or any human-use effect.

Studied as an adjunct therapy for celiac disease to reduce gluten-triggered intestinal permeability and symptoms.

• Gut healthStudied in gastrointestinal research, including gut-lining integrity and inflammatory-condition models.

In clinical trials — has reached Phase 3 trials for celiac disease, with a favorable safety and tolerability profile across Phase 1-3 studies.

Where the science stands — an approved drug is not the same as the research-grade material a vendor sells, which is unregulated regardless.

• Independent purity. Look for a third-party COA (Janoshik or MZ) showing a measured purity — not just a number the vendor typed.
• Batch match. The strongest evidence is a certificate for the exact batch you’ll receive, attributed to this vendor — check the cross-verification on the listing.
• Vendor reputation. See how the vendor is talked about in the community before trusting a new name.

Research context only — VialGrade never gives dosing, medical, or human-use guidance.