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.

This article is part of the PlexusDx Education Hub — your resource for evidence-based guidance on precision health. Browse all Precision Health education

PlexusDx is a CLIA-certified precision health company built on one idea: your biology is unique, and your health guidance should be too. Instead of generic wellness advice, PlexusDx turns your DNA and blood biomarkers into personalized, actionable insight you can actually use.

Our Mission: Health Guidance That Fits Your Biology

There is no one-size-fits-all approach to healthcare. Two people can follow the same diet, take the same supplements, and get very different results — because their genetics are different. PlexusDx exists to close that gap. We combine at-home genetic testing, blood biomarker analysis, and personalized recommendations so you can make decisions aligned with your own biology instead of population averages.

The goal is clarity, direction, and confidence. Customers often describe the moment they see their results as the moment things finally made sense — a roadmap replacing guesswork.

The Problem With One-Size-Fits-All Advice

Most health advice is written for the average person, and almost no one is average. Your metabolism, your nutrient needs, your stress response, and your long-term health tendencies are all shaped in part by inherited variants in your DNA. Ignore that layer, and you are optimizing blind.

Precision health flips the model. It starts with your data, then works outward to recommendations — diet, lifestyle, supplement, and biomarker follow-up — that reflect how your body is actually built.

What Your Genes Can Reveal

Small variations in single genes can shape how your body works day to day. A few well-studied examples show up across the PlexusDx panels:

MTHFR influences methylation — the process that helps your body convert folate into its active form for DNA repair, detoxification, and neurotransmitter production. Common variants such as C677T can reduce enzyme efficiency, which is why some people benefit from methylated forms of folate.

FTO, often called the “fat mass and obesity-associated” gene, is linked to appetite regulation and body-weight tendencies. Certain FTO variants are associated with stronger hunger signaling, which helps explain why appetite control feels harder for some people than others.

COMT helps clear dopamine, adrenaline, and estrogen. Whether you are a fast or slow COMT metabolizer can influence how you handle stress, caffeine, and hormone processing. None of these variants is a verdict — they are a map that helps you understand your tendencies.

How PlexusDx Testing Works

The process is designed to remove friction. You order online, no doctor's visit required. You collect an at-home saliva sample and mail it back. Your DNA is analyzed on the Illumina Global Screening Array in CLIA- and COLA-certified laboratories, and your results are delivered securely through the PlexusDx Results Portal.

Your data is HIPAA-protected and never sold or shared without your consent. And because your DNA never changes, genetic testing is a one-time investment whose insights stay relevant for life.

The Precision Peptide Genetic Test

Our peptide-focused panel is a good example of how specific PlexusDx gets. The Precision Peptide Genetic Test analyzes 14 pathways, 49 peptides, 150+ genetic insights — mapping how your genes influence peptide-related biological pathways such as GLP-1 receptor signaling, appetite regulation, and recovery.

Importantly, the test tells you about your biology. It does not tell you what to put in your body, and it does not predict how you will respond to any specific medication. It is upstream context — the kind of insight that turns a peptide-protocol decision into an informed conversation with your provider rather than a guess.

From Insight to Action

Data alone is not the point — action is. Every PlexusDx report pairs your genetic and biomarker findings with personalized, evidence-based recommendations grounded in more than 20,000 clinical studies. You can also connect with clinical pharmacists and registered dietitians through the PlexusDx Network to translate results into next steps.

Ready to understand your biology at the pathway level? The Precision Peptide Genetic Test analyzes how your genes shape peptide-related pathways, giving you and your provider a clearer starting point — test before you invest. Genetics as a guide, not a guarantee.

Frequently Asked Questions About PlexusDx

What does PlexusDx do?

PlexusDx is a CLIA-certified precision health company that offers at-home genetic tests, blood biomarker panels, and personalized wellness recommendations. Rather than generic advice, the company translates your DNA and lab data into actionable insight you can discuss with a qualified healthcare provider and act on with confidence.

Do I need to take the genetic test more than once?

No. Your DNA does not change over your lifetime, so a genetic test is a one-time investment whose insights stay relevant for years. Blood biomarkers do change, so biomarker panels can be repeated over time to track how your body responds to lifestyle and other factors.

Is a PlexusDx test a medical diagnosis?

No. PlexusDx tests provide genetic insights and biomarker data for education and long-term wellness, not diagnosis or emergency use. Results describe tendencies and predispositions, not verdicts. Always share your results with a qualified healthcare provider, who can interpret them within your full medical history.

Disclaimer: The Precision Peptide Genetic Test analyzes how your genes influence peptide-related biological pathways. It does not recommend, prescribe, or determine which peptides you should use, and it does not diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare provider before beginning any peptide protocol.

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.

This article is part of the PlexusDx Education Hub. Browse all Precision Health education