Quick Answer

MBC-267 is a complex of naturally-occurring peptides — reported to number 267 — derived from Norwegian salmon protein hydrolysate and mushrooms, used as the defining ingredient in THREE International's GLP THREE supplement. It is marketed as gently supporting the body's GLP-1 pathway. It is a dietary-supplement ingredient, not a prescription GLP-1 medication.

Important framing: MBC-267 is a supplement ingredient. It is not a GLP-1 receptor agonist drug like semaglutide or tirzepatide, and a supplement containing it is not a substitute for a prescribed medication. This page explains what MBC-267 is; any decision about metabolic or weight-management treatment belongs with your physician.

What it is

MBC-267 is a branded peptide complex. Peptides are short chains of amino acids — the building blocks of protein. This particular complex is derived from Norwegian salmon protein hydrolysate (salmon protein broken down into smaller fragments) together with mushroom-derived components, and the "267" refers to the number of naturally-occurring peptides reported in the complex. It is exclusive to THREE and described as patent-pending.

How it's said to work

The GLP-1 pathway is a natural hormonal system your body uses after eating — it helps signal fullness, moderate appetite, and support healthy blood-sugar regulation. THREE positions MBC-267's peptides as interacting with this pathway gently and supportively, as a dietary supplement, rather than strongly activating the GLP-1 receptor the way a prescription drug does.

MBC-267 vs. a prescription GLP-1 medication

This is the distinction that matters most. Prescription GLP-1 receptor agonists are FDA-regulated peptide medications engineered to bind the GLP-1 receptor powerfully, backed by large clinical trials for weight and blood-sugar outcomes. MBC-267 is a food-derived supplement ingredient with a gentler, supportive positioning and ingredient-level evidence. They are different categories — different ingredients, mechanisms, evidence, and regulation.

The honest read: MBC-267 is a genuinely interesting, novel supplement ingredient with a real scientific rationale for the GLP-1 pathway. That rationale is about the pathway and the ingredient — not proof that the supplement reproduces a prescription drug's results. Expect supportive, supplement-level effects, and keep drug-level expectations attached only to drugs.

For the full comparison, see GLP THREE vs. prescription GLP-1 medications, or the full GLP THREE review.

The full picture
Read the Complete Guide to Cellular Absorption & Bioavailability →

Related Questions

Is MBC-267 the same as Ozempic or semaglutide?+
No. MBC-267 is a food-derived supplement ingredient. Semaglutide and similar drugs are FDA-regulated prescription medications that strongly activate the GLP-1 receptor. They are different categories and one is not a substitute for the other.
What is MBC-267 made from?+
It's a complex of naturally-occurring peptides derived from Norwegian salmon protein hydrolysate and mushroom components, reported to contain 267 peptides — hence the name.
Is there clinical proof MBC-267 causes weight loss?+
The evidence for MBC-267 is at the ingredient and pathway level, not the large randomized human trials that support prescription GLP-1 medications. It should be viewed as gentle metabolic support, not a proven weight-loss drug.
Disclosure & disclaimer. Ed Drost is a compensated THREE International Founding Member and Brand Ambassador. General claims cite independent sources. Educational, not medical advice. Not evaluated by the FDA; not intended to diagnose, treat, cure, or prevent any disease.