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 delivers personalized health reports

that reveal how specific genetic traits affect your well-being. We explore the AHCY gene which plays an essential role in methylation and homocysteine metabolism revealing its possible health implications. The essential biochemical activity known as methylation functions through the movement of methyl groups from one molecule to another. Environmental signals trigger gene expression control through methyl groups which function as switches in a process called epigenetics. These molecules serve as critical signals for the breakdown and elimination of hormones and brain chemicals along with amino acids which help maintain the body's delicate balance. The methylation cycle disruption leads to health problems that affect heart function as well as mental health and fertility while also contributing to birth defects and cancer development. The methylation cycle depends on folate conversion to active methylfolate (5-methyl THF) which transforms dangerous homocysteine into methionine. Methionine plays a key role in producing SAM-e (S-adenosyl-methionine), which serves as an essential source of methyl groups required for methylation activities. The SAHH enzyme produced by the AHCY gene transforms S-adenosylhomocysteine into adenosine and homocysteine which constitutes an essential phase of the methylation cycle. Scientists have discovered uncommon variants of the AHCY gene including rs41301825-T and rs13043752-A that modify the enzyme structure and decrease its activity but scientific data about these variants continues to be insufficient. We need additional studies to determine how these genetic factors affect methylation processes and human health. Research findings show that the rs13043752 genetic variant leads to venous thrombosis regardless of homocysteine concentrations which demonstrates the intricate nature of genetic factors affecting health outcomes. Given the changing knowledge about genetic traits such as AHCY people should conduct genetic testing carefully and seek professional medical advice for complete information. PlexusDx delivers Precision Health & Wellness tests to uncover genetic predispositions which help you make educated health choices. Start your customized health adventure today by investigating the assortment of tests available at PlexusDx.com, Amazon, and Walmart. While genetic information serves as an effective tool for improving your health it should be used alongside professional medical advice for interpretation. Use the results from your genetic testing to take active measures that will optimize your health. The information contained within your genetic structure reveals essential details that can help create a healthier life for you.

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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