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Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

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Most longevity DNA tests ask a version of the same question: which aging risk factors do your genes predict? They scan broad markers — telomere-associated variants, inflammation markers, oxidative stress tendencies — and deliver a generalized aging risk profile. The PlexusDx Precision Peptide Genetic Test asks a more specific question: which biological pathways intersect with the compounds most studied in longevity research, and what does your genetic profile look like across all of them? The result is 17 longevity-aging genetic insights — mapped across five distinct peptide pathways, 15 SNPs, and 14 genes — representing one of the most targeted longevity genetic panels available in at-home testing.

For a deeper look at how the Precision Peptide Genetic Test specifically maps 17 longevity-aging genetic insights — including FOXO3, TERT, SIRT1, and PPARGC1A — read our complete longevity pathway guide.

The 17 Insights: How They Are Organized

Like the weight management pathway, the longevity-aging insights are not 17 separate genes. They represent 17 unique combinations of a peptide pathway and a genetic variant. Five peptide pathways are covered. Because multiple pathways share biological foundations — particularly around cellular aging and stress resistance — a single gene like FOXO3 or TERT appears across more than one pathway, and each intersection carries its own specific biological meaning.

The 17 insights cluster into four biological domains: cellular aging and lifespan regulation, antioxidant defense, mitochondrial function, and immune and inflammatory balance. Here is what each cluster covers.

Cluster 1: Cellular Aging and Lifespan Regulation

The most fundamental question in longevity genetics is how cells age — and how the body's built-in aging mechanisms are regulated at the genetic level. Five genes in this cluster govern the core machinery of cellular longevity:

FOXO3 — rs2802292
FOXO3 is one of the most replicated longevity genes in human genetics. Variants in FOXO3 have been independently associated with exceptional longevity — including living past 100 — across multiple large population studies spanning different ancestries. FOXO3 is a transcription factor that regulates stress resistance, apoptosis, and the cellular repair pathways that determine how well cells cope with damage over time. In the PlexusDx longevity panel, FOXO3 rs2802292 appears in both the Epitalon and FOXO4-DRI pathways — reflecting how central this gene is to the biology both compounds are studied for.

If you're interested in how your genetics influence longevity pathways beyond telomere length — including FOXO3, SIRT1, and antioxidant defense genes — this guide covers all 17 longevity insights in the Precision Peptide Genetic Test.

TERT — rs2736100
TERT encodes telomerase reverse transcriptase — the enzyme responsible for maintaining telomere length by adding protective DNA sequences to chromosome ends during cell division. Telomere shortening is one of the hallmark mechanisms of cellular aging; cells with shorter telomeres replicate less efficiently and eventually enter senescence. TERT rs2736100 appears in both the Epitalon and FOXO4-DRI pathways, reflecting the central role of telomere biology in longevity research.

SIRT1 — rs12778366 and rs3758391
SIRT1 is a sirtuin — a family of proteins that regulate cellular health in response to energy status and stress. SIRT1 influences mitochondrial function, DNA repair, inflammation, and fat metabolism, and is one of the most studied genes in aging biology. Both rs12778366 and rs3758391 appear in the Epitalon pathway in the PlexusDx panel, covering two independent aspects of SIRT1-related biology.

TP53 — rs1042522
TP53 encodes p53, often called "the guardian of the genome" — a tumor suppressor protein that responds to cellular stress, DNA damage, and oxidative injury by triggering repair, cell cycle arrest, or programmed cell death. TP53 rs1042522 (Pro72Arg) is one of the most widely studied polymorphisms in cancer and aging research. In the PlexusDx panel, it appears in the FOXO4-DRI pathway — a compound studied specifically for its interaction with p53 in the context of cellular senescence.

Cluster 2: Antioxidant Defense

Oxidative stress — the accumulation of reactive oxygen species that damage cells, proteins, and DNA — is a central mechanism of biological aging. Five genes govern the body's ability to neutralize oxidative damage:

GCLC — rs17883901 and GCLM — rs41303970
These two genes encode the heavy and light subunits of glutamate-cysteine ligase — the rate-limiting enzyme in glutathione biosynthesis. Glutathione is the body's primary intracellular antioxidant. Variants in GCLC and GCLM influence how efficiently the body produces glutathione in response to oxidative load. Both appear in the Glutathione pathway in the PlexusDx panel.

GPX1 — rs1050450 and GSTP1 — rs1695
GPX1 encodes glutathione peroxidase 1 — the enzyme that uses glutathione to neutralize hydrogen peroxide and lipid peroxides. GSTP1 encodes glutathione S-transferase Pi 1, which conjugates glutathione to toxins and reactive compounds to facilitate their elimination. Both rs1050450 and rs1695 are well-studied variants in antioxidant capacity research. Together with GCLC and GCLM, they form all four insights in the Glutathione longevity pathway.

CAT — rs1001179
Catalase is another key antioxidant enzyme that converts hydrogen peroxide into water and oxygen — functioning as a frontline defense against oxidative damage. The rs1001179 variant influences catalase activity levels and appears in the Vilon pathway in the PlexusDx panel.

Cluster 3: Mitochondrial Function

PPARGC1A — rs8192678
PPARGC1A encodes PGC-1α — the master regulator of mitochondrial biogenesis. This protein governs how many new mitochondria cells produce, how efficiently existing mitochondria function, and how the body's energy metabolism adapts to physical and metabolic demands. Because mitochondrial decline is one of the hallmarks of aging, PPARGC1A is a central figure in longevity biology. The rs8192678 variant appears in the Humanin pathway — a mitochondria-derived peptide studied for its neuroprotective and anti-aging properties.

Cluster 4: Immune and Inflammatory Balance

Chronic low-grade inflammation — often called "inflammaging" — is one of the most consistent features of biological aging. Four genes in the Vilon pathway address this dimension of longevity biology:

HLA-DQA1 — rs2187668
HLA-DQA1 is part of the major histocompatibility complex — the genetic system that governs how the immune system recognizes and responds to pathogens and self-tissues. Variation here influences immune efficiency and the balance between effective defense and excessive inflammatory activity.

IL10 — rs1800896
IL10 encodes interleukin-10, one of the most important anti-inflammatory cytokines in the immune system. IL10 helps regulate the intensity of immune responses and supports recovery after immune activation. Variation in IL10 production is associated with differences in inflammatory baseline and immune resilience with age.

TLR4 — rs4986791 and TNF — rs1800629
TLR4 encodes a pattern recognition receptor that helps detect microbial threats and trigger innate immune responses. TNF encodes tumor necrosis factor, a key inflammatory signaling molecule. Together, these genes influence how strongly the body mounts and sustains inflammatory responses — a balance that becomes increasingly important as immune regulation shifts with age.

The 5 Longevity Peptide Pathways

Epitalon — A tetrapeptide studied for its potential effects on telomere maintenance and pineal gland function. Intersects with FOXO3, SIRT1 (×2), and TERT — covering four of the 17 longevity insights and emphasizing cellular aging and stress resilience biology.

FOXO4-DRI — A modified peptide studied specifically for its interaction with p53 in senescent cells — a mechanism investigated in the context of clearing cells that have stopped dividing but continue to produce inflammatory signals. Intersects with FOXO3, TERT, and TP53.

Glutathione — The body's master antioxidant, produced intracellularly from three amino acids. The Glutathione pathway covers all four genes directly involved in glutathione synthesis and utilization — GCLC, GCLM, GPX1, and GSTP1 — making it the most genetically self-contained of the five pathways.

Humanin — A mitochondria-derived peptide studied for neuroprotective, metabolic, and anti-aging properties. Its single insight in the panel — PPARGC1A rs8192678 — connects it to the master regulator of mitochondrial biogenesis, making it a precise and high-value data point despite its singular position.

Vilon — A dipeptide studied in bioregulator research for immune modulation and longevity support. The Vilon pathway is the largest in the longevity panel — five insights across CAT, HLA-DQA1, IL10, TLR4, and TNF — covering the full immune and inflammatory biology cluster.

What 17 Insights Together Reveal

No single longevity gene is a destiny. FOXO3, TERT, SIRT1, GPX1 — each of these variants contributes to a biological landscape, not a fixed outcome. The value of 17 insights is that they map that landscape across four distinct biological domains: how your cells handle the aging process, how efficiently your antioxidant systems operate, how well your mitochondria function, and how your immune system balances defense against chronic inflammation.

That picture, combined with clinical evaluation and biomarker data, gives you and any healthcare provider working with you a far more precise foundation than a general aging risk profile can provide. The Precision Peptide Genetic Test analyzes 150+ genetic insights across 14 pathways — 17 of which are dedicated to longevity and aging biology. Results are delivered through the PlexusDx Results Portal, where each of the 17 longevity insights is explained in plain language with your specific genotype highlighted.

Genetics as a guide, not a guarantee. Test before you invest in any longevity protocol.

Ready to see all 17 of your longevity genetic insights? Explore the Precision Peptide Genetic Test

The Precision Peptide Genetic Test analyzes how your genes influence longevity-aging pathways. It does not recommend, prescribe, or determine which peptides you should use. Consult a qualified healthcare provider before beginning any peptide protocol.

Frequently Asked Questions

What does DNA longevity testing reveal?

DNA longevity testing identifies genetic variants in pathways linked to cellular aging, antioxidant defense, mitochondrial function, and immune regulation. The PlexusDx Precision Peptide Genetic Test analyzes 17 longevity-aging insights — giving you a specific genetic map of the biological systems most studied in longevity research, across five peptide-related pathways.

How is the Precision Peptide Genetic Test different from a general longevity DNA test?

General longevity DNA tests focus on broad aging risk factors or telomere-associated variants. The Precision Peptide Genetic Test specifically analyzes pathways intersecting with longevity-studied peptide compounds — 17 insights across Epitalon, FOXO4-DRI, Glutathione, Humanin, and Vilon — providing targeted genetic context that general longevity panels don't deliver.

What is FOXO3 and why does it appear in two longevity pathways?

FOXO3 is one of the most well-studied longevity genes in human genetics — variants have been associated with exceptional longevity across multiple independent population studies. In the PlexusDx panel, FOXO3 rs2802292 appears in both the Epitalon and FOXO4-DRI pathways, reflecting its central role in cellular stress resistance and aging biology.

What role does TERT play in longevity genetics?

TERT encodes telomerase reverse transcriptase — the enzyme that maintains telomere length by adding protective sequences to chromosome ends. Telomere shortening is a hallmark mechanism of cellular aging. TERT rs2736100 appears in both the Epitalon and FOXO4-DRI longevity pathways in the PlexusDx panel, reflecting telomere biology's centrality to longevity research.

What is the Glutathione pathway and which genes does it cover?

The Glutathione pathway covers four genes — GCLC, GCLM, GPX1, and GSTP1 — providing four of the 17 longevity insights. These genes govern how efficiently the body produces and uses glutathione, its primary intracellular antioxidant. Glutathione levels decline with age, making this pathway a key focus in longevity and cellular health biology.

Is at-home DNA longevity testing accurate?

The Precision Peptide Genetic Test directly genotypes each longevity SNP on the Illumina Global Screening Array — the same platform used in clinical research. Your genotype at all 17 longevity positions is measured precisely from your DNA, not estimated. What varies is the biological weight of any single variant — which is why all 17 matter together.

Can my longevity genetic profile change over time?

No — your DNA doesn't change, making the Precision Peptide Genetic Test a one-time investment. Your 17 longevity genetic insights remain valid for life. As longevity research evolves, the biological understanding of these variants will deepen — but your genotype at each of these 15 SNP positions is fixed from birth.

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Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.