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: Unraveling the Mysteries of the MAOB Gene

PlexusDx stands as a premier source for personalized health reports and helps individuals understand their genetic risk factors. Our focus today turns toward the fascinating MAOB gene which plays a vital role in mental and cognitive wellness. Join us to discover how MAOB gene variants affect brain chemicals dopamine and phenylethylamine and how these genetic differences might lead to chronic fatigue and additional conditions.

The MAOB gene produces monoamine oxidase B which serves as an essential enzyme responsible for breaking down neurotransmitters including dopamine and phenylethylamine. These molecules serve vital functions in brain signaling which directly impact mental processes and emotional states. The complex interactions among monoamines serotonin, dopamine, and norepinephrine highlight the intricacy of brain operations and mental health processes.

Different versions of the MAOB gene have shown links to multiple medical conditions including chronic fatigue and depression as well as high blood pressure Parkinson's disease and schizophrenia. The genetic model of MAOB variants is still unproven by comprehensive scientific studies yet ongoing research remains vital in understanding the genetic risk factors these variants present.

People with MAOB variants that boost enzyme function tend to have decreased monoamine amounts because of faster breakdown processes. Researchers have discovered that the genetic variants 'G' at rs3027452, 'G' at rs2283729, and 'T' at rs1799836 correlate with different health-related outcomes. The 'T' allele at genetic marker rs1799836 leads to increased anger levels while simultaneously decreasing the risk of developing Parkinson's disease. The rs3027452 'G' allele demonstrates associations with both lower blood pressure and improved mood responses following tryptophan treatment.

The study of MAOB genetic variants provides important information about personal health risks and profiles. The Precision Health & Wellness tests available through PlexusDx at PlexusDx.com and retailers like Amazon and Walmart enable individuals to receive personalized reports detailing their genetic predispositions which help them make knowledgeable decisions about their health. The MAOB gene proves essential for mental and cognitive health through its role in regulating neurotransmitter levels and affecting multiple health conditions. Individuals who investigate MAOB gene variants can better understand their genetic predispositions and act proactively to improve their health. Leverage PlexusDx genetic insights to start your personalized wellness journey today.

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.