Genetic Factors Affecting eGFR and Kidney Health

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 genetics and health. Browse all Genetics & Health education

Your eGFR — estimated glomerular filtration rate — is the number clinicians use to gauge how well your kidneys filter blood. It is shaped by age, muscle mass, and health status, but genetics plays a real role too. Understanding which genes influence eGFR and kidney function can add useful context to a conversation with your provider.

What eGFR measures

eGFR estimates how many milliliters of blood your kidneys filter per minute, usually calculated from a blood creatinine level plus age and sex. Higher is generally better; a persistently low eGFR is one signal clinicians use when evaluating kidney health. Because creatinine reflects muscle metabolism, the estimate is an approximation — which is exactly why the underlying biology, including genetics, matters.

Genes that influence kidney filtration

Large genome-wide studies of kidney function have repeatedly flagged UMOD, the gene for uromodulin, the most abundant protein in normal urine. The variant rs12917707 near UMOD is one of the most consistently replicated associations with eGFR and kidney function across populations. Other recurring signals include SHROOM3 and GATM, a gene involved in creatine synthesis that can influence creatinine-based estimates directly. Uromodulin itself is a useful example of how biology and measurement intertwine: made only in the kidney, it helps regulate salt handling and protects against urinary stones and infection, so variants that change UMOD output can shift both kidney physiology and the biomarkers used to estimate function.

APOL1 and kidney risk

Among the most studied kidney genes is APOL1. Two coding variants, commonly called G1 (rs73885319) and G2 (rs71785313), arose in populations of West African ancestry and are associated with kidney disease risk when a person carries two risk copies. APOL1 illustrates a key principle: genetic risk is population-specific and probabilistic. Carrying a variant is context, not a diagnosis, and interpretation belongs with a qualified provider.

What the research shows

Genome-wide association studies pooling hundreds of thousands of participants have identified dozens of loci linked to eGFR, with UMOD and APOL1 among the strongest. The mechanisms range from how the kidney handles salt and uromodulin to how creatinine is generated and cleared. Still, most individual variants have small effects, and lifestyle, blood pressure, and metabolic health remain major drivers of kidney trajectory over time. This is why nephrologists treat genetics as one input among several. Hydration, blood-pressure control, blood-sugar management, and avoiding nephrotoxic exposures all shape long-term kidney health regardless of genotype — and many of these are modifiable in ways your DNA is not.

What your PlexusDx genetic insights reveal

Kidney-relevant genes sit within the metabolic and filtration-related pathways that PlexusDx examines at the DNA level. The Precision Peptide Genetic Test analyzes 14 pathways, 49 peptides, 150+ genetic insights — placing variants like these in the context of the biological systems they touch, not a diagnosis or a verdict.

Seeing your genetic context alongside your lab-measured eGFR gives you a richer, more informed question to bring to your provider — not a diagnosis or a treatment plan. Genetics is a guide, not a guarantee.

Frequently Asked Questions About Genetics and eGFR

Can genetics lower my eGFR?

Genetics can influence baseline kidney filtration and creatinine levels, which feed into eGFR. Variants near UMOD (rs12917707) and in APOL1 are associated with kidney function in research. However, eGFR is driven mainly by age, blood pressure, and metabolic health — genes add context, not a diagnosis.

What is the APOL1 gene's role in kidney health?

APOL1 carries variants called G1 and G2 that arose in West African ancestral populations and are associated with higher kidney disease risk in people carrying two risk copies. It is a probabilistic, population-specific association — carrying a variant is context for a provider conversation, never a diagnosis on its own.

Does genetic testing replace a kidney function blood test?

No. Genetic insight and eGFR bloodwork answer different questions. eGFR measures how your kidneys are filtering right now, while genetics describes inherited tendencies that never change. They are complementary — a genetic result adds context, but only a healthcare provider can interpret your current kidney function.

Want to see where your own pathways stand? Take the Precision Peptide Genetic Test to understand how your DNA shapes 14 peptide-related biological pathways — genetics as a guide, not a guarantee.

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

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, prevent, or manage any disease or condition. Consult a qualified healthcare provider before making decisions about your health.

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.