Longevity & Mitochondrial Peptides UK | SS-31 MOTS-C NAD+

August 22, 2026

Longevity & Mitochondrial Peptides: A Researcher’s Guide

Longevity & Mitochondrial Peptides UK | SS-31 MOTS-C NAD+ — longevity and mitochondrial peptides represent one of the most active frontiers in ageing biology and metabolic research. Compounds that target mitochondrial function, cellular energy metabolism, and age-related decline have attracted significant scientific interest over the past decade — and a small group of research peptides sits at the centre of this field. This guide covers the key longevity and mitochondrial peptides available for laboratory research in the UK, what makes each one distinct, and how they relate to one another.

What Are Longevity and Mitochondrial Peptides?

Longevity peptides are compounds studied for their interactions with biological pathways associated with ageing, cellular energy production, and metabolic regulation. Mitochondrial peptides specifically target the mitochondria — the cell’s primary energy-producing organelles — and are of particular interest in research exploring how mitochondrial dysfunction contributes to age-related disease. Like all research peptides, they are supplied strictly for in-vitro and laboratory investigation only.

NAD+: Longevity Coenzyme and Central Metabolic Research Tool

NAD+ (Nicotinamide Adenine Dinucleotide) is one of the most studied molecules in ageing biology and metabolic research. Found in every living cell, it plays a central role in cellular energy metabolism, DNA repair, and the regulation of circadian rhythms. NAD+ levels decline significantly with age, making it a focal point in longevity peptide research.

Key research areas include:

Cellular energy metabolism and mitochondrial function
Sirtuin (SIRT1–7) pathway activation and longevity research
DNA damage repair mechanisms (PARP pathway)
Ageing biology and age-related metabolic decline
Metabolic syndrome and insulin resistance models
Neurodegeneration and neuroprotection research
Circadian rhythm and chronobiology studies

As a substrate for both sirtuins and PARP enzymes, NAD+ sits at the intersection of energy metabolism, genomic stability, and longevity signalling. Further reading: What Is NAD+?

SS-31: Mitochondrial Peptide for Cardiolipin and Energy Research

SS-31 (Elamipretide / MTP-131) is a synthetic aromatic-cationic tetrapeptide that selectively targets cardiolipin within the inner mitochondrial membrane. It is one of the most extensively studied mitochondrial peptides in both preclinical and clinical research, with a unique mechanism centred on stabilising mitochondrial cristae architecture and protecting the electron transport chain.

Key research areas include:

Cardiolipin binding and mitochondrial cristae stabilisation
Oxidative stress and ROS reduction models
Mitochondrial bioenergetics and ATP synthesis
Cardiac ischaemia-reperfusion injury models
Heart failure and cardiomyopathy research
Skeletal muscle ageing and sarcopenia studies
Neurodegenerative disease models
Age-related mitochondrial decline

SS-31 is notable for having progressed into human clinical trials as Elamipretide — making it one of the few mitochondrial peptides to reach this stage. Further reading: What Is SS-31?

MOTS-C: Mitochondrial-Derived Longevity Peptide and AMPK Research

MOTS-c (Mitochondrial ORF of the 12S rRNA Type-C) is a 16-amino acid mitochondrial-derived peptide (MDP) — encoded within the mitochondrial genome itself, not the nuclear genome. First characterised in 2015, it has attracted significant interest in metabolic biology and longevity research for its role as a retrograde mitochondrial signal.

Key research areas include:

AMPK pathway activation and metabolic regulation
Glucose homeostasis and insulin sensitivity models
Mitochondrial-nuclear retrograde signalling
Mitochondrial biogenesis and energy metabolism
Age-related metabolic decline research
Skeletal muscle biology and exercise physiology models
Antioxidant defence and oxidative stress models

MOTS-c’s ability to translocate to the nucleus under metabolic stress — regulating gene expression related to glucose metabolism and antioxidant defence — makes it a compound of particular interest in mitochondrial-nuclear communication research. Further reading: What Is MOTS-C?

How These Longevity Peptides Relate to Each Other

NAD+, SS-31, and MOTS-c each target distinct aspects of mitochondrial and metabolic biology, but their research areas frequently overlap. NAD+ is primarily studied as a coenzyme substrate for sirtuin and PARP pathways, central to energy metabolism and DNA repair. SS-31 is primarily studied for its direct interaction with the inner mitochondrial membrane via cardiolipin, protecting electron transport chain function and reducing ROS. MOTS-c is primarily studied as a mitochondrial-derived signalling peptide, activating AMPK and influencing whole-body metabolic homeostasis. Researchers in longevity biology often study these compounds in parallel, as they address complementary aspects of mitochondrial health.

Sourcing Longevity and Mitochondrial Peptides in the UK

All longevity and mitochondrial peptides supplied by Precision Chain Peptides are manufactured to ≥99% purity, HPLC-verified, and supplied with a batch-specific Certificate of Analysis. All compounds are dispatched from the UK and supplied strictly for in-vitro and laboratory research use only. Browse the full research peptide range.

Research Use Only

All compounds supplied by Precision Chain Peptides are strictly for in-vitro and laboratory research use only. They are not intended for human or animal consumption, personal use, or self-administration.