Vitamin D levels get all the attention — but VDR, the gene encoding the vitamin D receptor, determines whether those levels actually translate into muscle function. VDR variants influence protein synthesis, calcium handling, and satellite cell activity. The Precision Peptide Genetic Test analyzes VDR as one of 15 Muscle Growth insights across 14 pathways, 49 peptides, and 150+ genetic insights.

The GHSR gene encodes the ghrelin receptor — the trigger that initiates growth hormone pulses from the pituitary. GHSR variants shape the amplitude and frequency of GH output upstream of IGF-1 production. The Precision Peptide Genetic Test analyzes GHSR as one of 15 Muscle Growth insights across 14 pathways, 49 peptides, and 150+ genetic insights.

IGF-1 — the primary mediator of growth hormone signaling — converts GH axis activation into muscle growth, tissue repair, and anabolic adaptation. The Precision Peptide Genetic Test analyzes IGF1 variants as part of 15 Muscle Growth insights across 14 pathways, 49 peptides, and 150+ genetic insights — revealing how efficiently your biology converts growth hormone signals into action.

Myostatin — encoded by the MSTN gene — is the body’s primary biological brake on muscle mass accumulation. The Precision Peptide Genetic Test analyzes MSTN variants as part of 15 Muscle Growth insights across 14 pathways, 49 peptides, and 150+ genetic insights — revealing how tightly your genetics constrain your hypertrophy ceiling.

The ACTN3 R577X variant — known as the “sprint gene” — determines your muscle fiber type composition, shaping how your body builds power, recovers from training, and responds to growth hormone axis pathways. The Precision Peptide Genetic Test includes ACTN3 as one of 15 Muscle Growth insights across 14 pathways, 49 peptides, and 150+ genetic insights.

The Precision Peptide Genetic Test analyzes 15 muscle growth insights — ACTN3, IGF1, MSTN, GHSR, and GHR — within a panel of 14 pathways, 49 peptides, and 150+ genetic insights. This pillar guide breaks down each muscle gene, what it reveals about fiber type and growth response, and why your DNA is the most underused variable in any muscle protocol.

The Longevity-Aging pathway in the Precision Peptide Genetic Test delivers 17 insights organized across five functional clusters — antioxidant defense, NAD+ homeostasis, methylation, longevity transcription factors, and structural aging biology. Part of 14 pathways, 49 peptides, and 150+ genetic insights, these 17 variants map biological aging as a connected system, not a list of isolated risk genes.

Antioxidant capacity is not a single number — it is the combined genetic output of five overlapping enzyme systems, each with its own variant layer. The Precision Peptide Genetic Test maps SOD2, GPX1, GCLC, NFE2L2, FOXO3, and more across 14 pathways, 49 peptides, and 150+ genetic insights, revealing the genetic architecture your antioxidant biology is built on.

Yes — MTHFR C677T and A1298C connect to longevity through at least five distinct biological mechanisms, from vascular aging and epigenetic clock acceleration to glutathione substrate depletion and DNA repair impairment. The Precision Peptide Genetic Test maps MTHFR within 14 pathways, 49 peptides, and 150+ genetic insights, revealing how your methylation genetics shapes your aging biology.

Glutathione synthesis, recycling, and detoxification capacity are all genetically variable — GCLC, GCLM, GSR, GPX1, GSTM1, and NFE2L2 each shape a different step. The Precision Peptide Genetic Test maps these variants across 14 pathways, 49 peptides, and 150+ genetic insights, revealing where your antioxidant production is genetically strongest and where it leaks.

Yes — but how much NAD+ you can raise, through which pathway, and where your biggest genetic leak is all depend on your DNA. The Precision Peptide Genetic Test analyzes NAD+ pathway genetics across 14 pathways, 49 peptides, and 150+ genetic insights, revealing whether your rate-limiting step is synthesis, salvage, or overconsumption.

Yes — FOXO3 is one of the most replicated longevity genes in human genetics, and rs2802292 is the variant that explains why. The Precision Peptide Genetic Test analyzes FOXO3 alongside 14 pathways, 49 peptides, and 150+ genetic insights, revealing how your transcription factor genetics shapes oxidative stress resistance, DNA repair, and cellular lifespan.

Mitochondria generate the energy that powers every biological process — and mitochondrial decline is one of the most upstream drivers of aging. NRF2, KLOTHO, SOD2, SIRT1, FOXO3, and MTHFR all converge on mitochondrial biology. The Precision Peptide Genetic Test analyzes 17 Longevity & Aging insights spanning 14 pathways, 49 peptides, and 150+ genetic insights.

Growth hormone axis output declines with age — a process called somatopause. GHSR variants determine GH pulse sensitivity. IGF1 variants set downstream anabolic signal baseline. GHR variants shape how efficiently GH converts to IGF-1. The Precision Peptide Genetic Test analyzes all three as part of 17 Longevity & Aging insights spanning 14 pathways, 49 peptides, and 150+ genetic insights.

MTHFR converts dietary folate into the active form the methylation cycle requires. The C677T (rs1801133) and A1298C (rs1801131) variants reduce enzyme activity by 30–65%, limiting DNA repair, homocysteine clearance, and epigenetic age regulation. The Precision Peptide Genetic Test analyzes MTHFR as part of 17 Longevity & Aging insights spanning 14 pathways, 49 peptides, and 150+ genetic insights.

Telomeres are the protective chromosome caps that shorten with each cell division. TERT encodes telomerase, the enzyme that rebuilds them. The variant rs2736100 influences baseline telomerase activity and lifetime telomere attrition rate. The Precision Peptide Genetic Test analyzes TERT as part of 17 Longevity & Aging insights spanning 14 pathways, 49 peptides, and 150+ genetic insights.

SIRT1 is a NAD+-dependent enzyme that regulates DNA repair, inflammation, metabolic efficiency, and cellular stress response. Variants at rs12778366 and related loci influence how actively SIRT1 operates at baseline. The Precision Peptide Genetic Test analyzes SIRT1 as part of 17 Longevity & Aging insights spanning 14 pathways, 49 peptides, and 150+ genetic insights.

APOE comes in three allele variants — e2, e3, and e4 — that produce meaningfully different cardiovascular and cognitive aging trajectories. It is the most studied aging-related gene in human genetics. The Precision Peptide Genetic Test analyzes APOE as part of 17 Longevity & Aging insights within a panel spanning 14 pathways, 49 peptides, and 150+ genetic insights.

SOD2 encodes the primary antioxidant enzyme inside your mitochondria — responsible for neutralizing reactive oxygen species at their source. The A16V variant (rs4880) determines how efficiently SOD2 is imported into the mitochondrial matrix. The Precision Peptide Genetic Test analyzes SOD2 as part of 17 Longevity & Aging insights spanning 14 pathways, 49 peptides, and 150+ genetic insights.

FOXO3 is the most replicated longevity gene in science — variants are consistently associated with exceptional lifespan across independent centenarian cohorts in Japan, Italy, and the United States. The Precision Peptide Genetic Test analyzes FOXO3 as part of 17 Longevity & Aging insights within a panel spanning 14 pathways, 49 peptides, and 150+ genetic insights.

Peptide protocols fail many people not because the science is wrong, but because they're built for population averages. FTO, FOXO3, ACTN3, SHBG, and COMT variants mean weight management, longevity, muscle, and hormone biology works differently in everyone. The Precision Peptide Genetic Test analyzes 14 pathways, 49 peptides, and 150+ genetic insights to reveal exactly where your biology diverges.

The Precision Peptide Genetic Test analyzes 17 longevity and aging genetic insights — FOXO3, SOD2, APOE, SIRT1, and TERT among them — within a panel of 14 pathways, 49 peptides, and 150+ genetic insights. This pillar guide breaks down each longevity gene, what it signals about healthspan, and why your DNA is the highest-leverage variable in any aging strategy.

SNP, gene, allele, genotype, variant, pathway — six terms that appear in every genetic test report and confuse most first-time readers. The Precision Peptide Genetic Test analyzes 57 SNPs across 48 genes, delivering 14 pathways, 49 peptides, and 150+ genetic insights. This guide defines each term in plain English so your results make sense on first read.

CLIA certification is the federal standard that determines whether a genetic lab can produce results a qualified healthcare provider can actually act on. The Precision Peptide Genetic Test uses Illumina Global Screening Array genotyping at CLIA-certified labs — processing 57 SNPs across 48 genes for 150+ genetic insights. This post explains what CLIA certification requires and why the standard matters.

The Precision Peptide Genetic Test analyzes your genetic response to the pathways targeted by 49 unique compounds across five protocol families — GLP-1, growth hormone, androgens, estrogens, and vascular modulators. This post breaks down how each protocol family maps to genetic pathways, what the 49-peptide panel covers, and what your results reveal.

Genetic testing reveals tendencies, not outcomes — a FOXO3 variant doesn't predict lifespan, a slow-COMT variant doesn't diagnose any condition, an ACTN3 XX genotype doesn't cap muscle growth. The Precision Peptide Genetic Test analyzes 14 pathways, 49 peptides, and 150+ genetic insights. Understanding what DNA can and cannot tell you is the difference between informed and overconfident.

Your Precision Peptide Genetic Test report delivers 150+ insights across 14 pathways — FOXO3 for longevity, ACTN3 for muscle, COMT for methylation, and more. This guide walks through how to read pathway scores, interpret gene variants, and synthesize findings into the informed conversation every peptide protocol decision should start with.

Before committing to a peptide protocol, genetic testing reveals how your body will actually respond across GLP-1 signaling, growth hormone axis, estrogen clearance, and sexual response pathways. The Precision Peptide Genetic Test maps 14 pathways, 49 peptides, and 150+ genetic insights. Test first. Invest second. That sequence is the entire premise of precision peptide decisions.

The precision health stack is a 4-layer system: genetic testing as the foundation, blood work for state data, supplements and lifestyle for baseline support, and protocols as the intervention layer. The Precision Peptide Genetic Test anchors the stack — analyzing 14 pathways, 49 peptides, and 150+ genetic insights that shape how every layer above performs.

Genetic peptide testing analyzes how your DNA shapes 14 biological pathways that peptide protocols target — from GLP-1 signaling to growth hormone axis to estrogen clearance. The PlexusDx Precision Peptide Genetic Test delivers 150+ insights across 49 unique peptides, turning peptide decisions from guesswork into evidence-based conversations with your healthcare provider.