Peptide Research: Evidence Reviews and Mechanism Guides

What Is BPC-157? Mechanisms, Evidence and Research Gaps

BPC-157 is a synthetic 15–amino-acid peptide derived from a sequence identified in human gastric juice. It is investigated for tissue repair, angiogenesis and gut barrier function. Almost all published evidence comes from rodent models; controlled human data is very limited, and long-term safety has not been characterised.

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What Is TB-500? Thymosin Beta-4 Research Explained

TB-500 is a synthetic fragment of thymosin beta-4, a naturally occurring actin-sequestering protein involved in cell migration and wound repair. Research has focused on wound healing, corneal injury and cardiac repair. Thymosin beta-4 itself reached early human trials; the TB-500 fragment sold for laboratory use has not.

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How GHK-Cu Works: Copper Peptide Research Explained

GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine) found in human plasma, saliva and urine. Plasma levels fall with age, which prompted research into skin remodelling, wound repair and gene expression. It has the strongest human evidence base of the classic repair peptides, largely from dermatology.

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KPV Peptide Research: Anti-Inflammatory Tripeptide Explained

KPV is the C-terminal tripeptide fragment (lysine–proline–valine) of alpha-melanocyte-stimulating hormone. It retains much of the parent hormone's anti-inflammatory signalling without its pigmentary effects. Research is concentrated in experimental colitis and dermatitis models; human trials are minimal.

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MOTS-c Research: Mitochondrial-Derived Peptide Explained

MOTS-c is a 16–amino-acid peptide encoded within the mitochondrial 12S rRNA gene — one of the first recognised mitochondrial-derived peptides. Research links it to AMPK activation, metabolic flexibility and exercise adaptation. Nearly all functional data comes from cell and rodent work; human research is observational.

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SS-31 (Elamipretide): Cardiolipin-Targeted Peptide Research

SS-31, developed clinically as elamipretide, is a cell-permeable tetrapeptide that concentrates in the inner mitochondrial membrane and binds cardiolipin. It is one of the few research peptides with a substantial registered clinical trial programme, most notably in primary mitochondrial myopathy and Barth syndrome, with mixed results.

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Epitalon Research: Telomerase Claims Versus the Evidence

Epitalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) derived from epithalamin, a pineal gland extract studied in the former Soviet Union. It is widely promoted for telomerase activation and lifespan extension. The underlying studies are old, mostly from one institute, and largely fail modern methodological standards — this is the weakest evidence base of the compounds covered here.

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Thymosin Alpha-1 Research: Immune Signalling Evidence

Thymosin alpha-1 is a 28–amino-acid peptide derived from prothymosin alpha, produced by the thymus and involved in T-cell maturation. Of the peptides covered in this hub it has the most extensive human trial record — it is approved in around thirty countries for hepatitis B and as a vaccine adjuvant — but it is not approved in the US, EU or UK.

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