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.

PlexusDx: Exploring the Impact of MTHFD1 Gene on Choline Deficiency Risk

PlexusDx stands at the forefront of personalized health reporting by delivering essential genetic information to individuals. Our exploration today takes us into genetic complexity as we study the MTHFD1 gene which affects both methylation processes and folate metabolism. The role of this gene in determining choline deficiency risk plays a fundamental part in enhancing your health and wellness. The MTHFD1 gene produces an essential enzyme that controls the metabolism of tetrahydrofolate (THF) which plays a vital role in nucleotide production and homocysteine methylation. The conversion of Vitamin B9 folic acid into L-methylfolate depends on this gene which plays a vital role in multiple health processes. The MTHFD1 enzyme participates in the one-carbon metabolism cycle together with MTHFR to enable the conversion of homocysteine into methionine through methyl group contributions from folate and choline. The connection between MTHFD1 genetic variations and the susceptibility to choline deficiency has become clearer through scientific research. Research indicates that people who carry the "A" allele at rs2236225 exhibit increased symptoms of choline deficiency when consuming a low-choline diet. The genetic variant worsens the outcomes of folate deficiency by specifically raising homocysteine levels in particular groups. The "A" allele modifies MTHFD1 enzyme stability and temperature sensitivity which reduces its activity thus increasing the requirement for choline in homocysteine methylation. Scientific proof for the genetic model about MTHFD1 remains insufficient; however, existing research already demonstrates how gene variations could influence choline metabolism and affect health outcomes. Researchers need to conduct further studies to confirm these results and develop a complete picture of genetic risks associated with choline deficiency. The Precision Health & Wellness tests from PlexusDx help individuals achieve better health through genetic insights by examining traits such as MTHFD1 under the System Function & Longevity category. Through examination of these tests individuals receive customized genetic information which helps them understand their genetic risks and informs their health decisions. The following practical recommendations will help you minimize the risk of choline deficiency resulting from MTHFD1 gene variations. Support methylation processes through a balanced diet containing folate and choline sources. 2. A healthcare provider should evaluate your genetic predispositions to help customize your nutritional plan. 3. Ensure you maintain regular testing of your choline levels to quickly address any deficiencies that may arise. The MTHFD1 gene holds a critical function in both methylation processes and folate metabolism which affects the risk of choline deficiency among specific people. Actionable recommendations based on genetic insights enable people to take proactive steps to manage their health and maintain their well-being. Begin your journey to better health by checking out PlexusDx's Precision Health & Wellness tests which you can find at PlexusDx.com and through retailers like Amazon and Walmart. Personalized health reports enable individuals to unlock their genetic blueprint understanding while creating paths toward improved health for the future.

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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