ghk-cu

Longevity Peptides: GHK-Cu, NAD+ and MOTS-C Research Overview

September 18, 2026 · By My Store 3 Admin

Longevity research has increasingly focused on endogenous compounds whose concentrations decline with age — molecules that play established roles in cellular maintenance, metabolic regulation, and tissue repair. Three compounds have emerged as particularly well-studied in this context: GHK-Cu (the copper peptide triplex), NAD+ (nicotinamide adenine dinucleotide), and MOTS-C (a mitochondria-derived peptide). Each operates through distinct mechanisms; each has a meaningful body of preclinical and, in some cases, early clinical evidence.

This article provides a comparative research overview of all three compounds. Each has a dedicated research article for in-depth treatment. All Bloom Vitality products are supplied strictly for in vitro laboratory and research use only.

GHK-Cu: Copper Peptide and ECM Remodelling

GHK-Cu (Glycyl-L-Histidyl-L-Lysine copper complex) is a naturally occurring tripeptide-copper complex found in human plasma, wound fluid, and tissue. It is the most extensively studied copper-binding peptide in dermal and tissue repair research. Plasma concentrations decline from approximately 200 ng/mL at age 20 to under 80 ng/mL by age 60.

Proposed mechanisms include:

Stimulation of collagen and extracellular matrix synthesis in fibroblast cultures
Upregulation of antioxidant enzymes (SOD, catalase)
Pro-angiogenic effects in wound healing models
Broad gene expression modulation across repair and remodelling pathways

GHK-Cu has a particularly strong preclinical evidence base in skin biology and wound healing. The gene expression data (Pickart et al., 2012) is among the most striking in the longevity peptide literature, reporting regulation of over 4,000 genes across pathways relevant to tissue maintenance and cancer suppression — though the mechanistic route by which a tripeptide-copper complex produces such broad effects remains a subject of research.

Full overview: What is GHK-Cu? Copper Peptide Research Guide | Evidence appraisal: GHK-Cu Research: Evidence Quality & Scientific Context | Skin research: GHK-Cu and Skin Research: Preclinical Evidence

Research material: GHK-Cu 100mg

NAD+: Coenzyme and Sirtuin Biology

Nicotinamide adenine dinucleotide (NAD+) is a coenzyme present in all living cells, central to energy metabolism, DNA repair, and sirtuin-mediated gene regulation. Unlike GHK-Cu and MOTS-C, NAD+ is not a peptide — it is a dinucleotide coenzyme. It is included in this longevity research overview because it occupies the same research landscape and is studied in related contexts.

NAD+ concentrations decline measurably with age in both rodent and human studies. This decline has been linked to reduced mitochondrial function, impaired DNA repair, and diminished sirtuin activity. Key enzyme systems dependent on NAD+:

Sirtuins (SIRT1–7) — NAD+-dependent deacylases regulating gene expression, DNA repair, and metabolic adaptation
PARPs — NAD+-consuming DNA repair enzymes
CD38 — a major NAD+-consuming ectoenzyme whose expression increases with age

Of the three compounds in this overview, NAD+ has the most extensive human clinical data: multiple RCTs have confirmed that precursors (NR and NMN) raise blood NAD+ levels, though evidence for downstream functional benefit in humans remains mixed.

Full overview: NAD+: Coenzyme Research & Longevity Studies | Mechanisms: NAD+ and Cellular Biology | Evidence: NAD+ Research: Evidence Quality & Human Trials

Research material: NAD+ 500mg

MOTS-C: Mitochondria-Derived Peptide

MOTS-C (Mitochondrial Open Reading Frame of the 12S rRNA type-C) is an endogenous peptide encoded within the mitochondrial genome — a discovery that challenged the traditional understanding of mitochondria as organelles that do not produce bioactive signalling peptides. It was identified in 2015 by Lee et al. and has been primarily studied in the context of metabolic regulation and exercise biology.

Circulating MOTS-C concentrations decline with age in humans. Proposed mechanisms include:

AMPK activation and downstream effects on glucose metabolism
Exercise-mimicking metabolic effects in skeletal muscle
Mitochondrial stress response signalling
Proposed anti-inflammatory and stress-adaptive effects

MOTS-C has a smaller body of evidence than GHK-Cu or NAD+, reflecting its more recent discovery. The mitochondrial genome origin is scientifically novel and the AMPK mechanism is well-characterised, but translational evidence in humans is limited.

Full overview: MOTS-C: Mitochondrial Peptide Research Overview | UK context: MOTS-C Peptide UK: Research Overview & Laboratory Use | Evidence: MOTS-C Research: Evidence Quality & Scientific Landscape

Research material: MOTS-C 40mg

Comparative Summary

Compound	Type	Primary mechanism	Evidence stage	Age-related decline
GHK-Cu	Tripeptide-copper complex	ECM remodelling, antioxidant gene expression	Preclinical (extensive)	Yes (plasma levels)
NAD+	Dinucleotide coenzyme	Sirtuin/PARP substrate, electron carrier	Preclinical + human trials (precursors)	Yes (tissue and blood)
MOTS-C	Mitochondria-derived peptide	AMPK activation, metabolic regulation	Preclinical (early)	Yes (circulating levels)

Research Material

Bloom Vitality supplies all three compounds as independently third-party tested research material. Batch-specific Certificates of Analysis are available via our Certificates & Documentation page and Testing & Quality page. All compounds are available through the research peptides UK catalogue.