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.

People who prioritize their health should think about how their genetic composition affects their nutritional requirements and overall wellness.

Our exploration today takes us into the intersection of genetics and nutrition where we examine the role of the PEMT gene in relation to choline deficiency. Recognizing how specific PEMT gene variants impact liver and muscle health helps you optimize your well-being. The PEMT gene which produces the enzyme phosphatidylethanolamine N-methyltransferase serves an essential function in the manufacturing of phosphatidylcholine (PC) within the liver. The enzyme transforms phosphatidylethanolamine (PE) into PC via three methylation steps with S-adenosylmethionine (SAM-e) assistance. When dietary intake falls short, this pathway becomes the primary source for obtaining choline, which is essential for numerous physiological processes. PEMT expression in the liver enables essential functions like cell membrane maintenance and signaling processes through choline and PC which together support fat metabolism, brain health and overall well-being. Specific PEMT variants can interfere with the normal balance necessary for choline production which ultimately results in choline deficiency and the development of health problems. Studies have found particular PEMT variants including rs12325817, rs4646343, rs3760188, rs1531100, rs4646365, and rs7946 which show connections to choline deficiency and its effects. People who possess the 'G' allele variant rs12325817 experience a substantially increased risk of organ damage when consuming diets low in choline. The complex genetic landscape affecting choline metabolism becomes evident through the interaction between these variants as well as the inheritance patterns of risk alleles. Research shows that PEMT variants cause conditions such as heart disease and fatty liver but they also appear to reduce the risk of obesity. The dual impact illustrates how genetics and nutrition influence health outcomes which necessitates personalized dietary interventions built around genetic profiles. Those who have been identified with PEMT variants need to adopt preventive measures through their diet and lifestyle choices to address possible choline deficiency. These practical recommendations will help you maintain your liver and muscle health.

  1. People with specific needs should take choline supplements such as phosphatidylcholine and choline bitartrate after consulting their healthcare provider.
  2. You should schedule regular liver check-ups and screenings to monitor your liver health if liver conditions run in your family.
  3. Regular physical activity helps maintain muscle function and metabolism which supports dietary efforts to improve overall well-being.

Grasping the complex connections among genetics, dietary habits and health results will help you achieve the best possible state of well-being. You can obtain crucial knowledge about your genetic predispositions and make educated health decisions by investigating the Precision Health & Wellness tests from PlexusDx available at PlexusDx.com and both Amazon and Walmart. Start taking control of your wellness journey today by accessing personalized health insights which match your unique genetic profile.

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.

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