Research peptides for longevity, telomere health and mitochondrial function.
Independent, evidence-based summaries of the most-studied peptides in longevity biology — mechanism, published research, safety profile and UK regulatory status. For laboratory and research use only.
Most-studied longevity peptides
Six peptides with the deepest published research base, spanning telomere, mitochondrial, immune and cellular-repair pathways.
Epitalon
Telomere & PinealA synthetic tetrapeptide (Ala-Glu-Asp-Gly) derived from the pineal polypeptide epithalamin, studied for its effects on telomerase activity, circadian regulation, and lifespan extension in animal models.
GHK-Cu
Cellular RepairA naturally occurring copper-binding tripeptide (Gly-His-Lys) that declines with age and is studied for tissue remodelling, anti-inflammatory gene-expression effects and skin/connective-tissue repair.
MOTS-c
MitochondrialA 16-amino-acid mitochondrially-derived peptide encoded within the mitochondrial 12S rRNA gene; functions as an exercise-mimetic regulator of insulin sensitivity, AMPK signalling and metabolic homeostasis.
SS-31
MitochondrialA mitochondrially-targeted aromatic-cationic tetrapeptide that binds inner-mitochondrial-membrane cardiolipin and stabilises mitochondrial cristae structure, studied in cardiac, renal and skeletal-muscle ageing.
Humanin
MitochondrialA 24-amino-acid mitochondrially-derived peptide encoded within the 16S rRNA gene, studied for cytoprotective, metabolic and neuroprotective signalling that declines with age.
Thymosin Alpha-1
Thymic / ImmuneA 28-amino-acid synthetic equivalent of an N-acetylated peptide fragment originally isolated from thymic tissue, studied for immune-modulatory activity and increasingly examined in the context of immunosenescence and longevity.
Six mechanistic axes of longevity peptide research
Evidence-based, non-promotional, UK-focused.
LongevityPeptides.co.uk is an independent editorial resource. We do not sell peptides. Every entry on the site summarises published preclinical and clinical evidence, identifies mechanism, gives the safety profile reported in the literature, and frames the UK regulatory status accurately — none of the peptides discussed are licensed medicines in the UK, and all are supplied for laboratory and research use only.
For researchers and laboratories sourcing reference material, two UK suppliers active in the research-peptide market are PeptideAuthority.co.uk and PeptideBarn.co.uk. We link to them because their catalogues and analytical certificates are publicly available; we have no commercial relationship that influences editorial content.
If you are new to the field, the Epitalon and GHK-Cu entries are the most comprehensive starting points, with the deepest published research base. For a comparative overview, see our comparisons section.
Latest research summaries
Plain-English synopses of published studies from PubMed, the gerontology literature and major peptide research programmes. Cross-linked to peptide pages and updated as new evidence appears.