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.

Through its services PlexusDx leads the industry by delivering personalized health reports while providing genetic tests which reveal multiple aspects of your genetic structure to supply essential health insights.

Our discussion today will focus on the NOS3 gene and examine its crucial role in heart health and the potential effects of its genetic variations on heart disease risk. A protein identified as nitric oxide synthase 3 (NOS3) is produced by the NOS3 gene and plays a vital role in blood vessel health through nitric oxide (NO) synthesis. The molecule nitric oxide performs multiple essential roles in human physiology including blood flow regulation and heart disease prevention. Nitric oxide (NO) improves blood vessel function through multiple mechanisms. The process relaxes blood vessels through two actions: decreasing free calcium levels and preventing vessel stiffness by breaking down superoxide free radicals. Nitric oxide prevents clogged arteries by stopping platelet activation and aggregation while blocking smooth muscle cell overgrowth and decreasing vessel inflammation together with cholesterol build-up. The production of NO must be carefully regulated because high levels can cause dangerous compounds to develop including peroxynitrite. Researchers have conducted extensive investigations into how the rs1799983 and rs2070744 polymorphisms of the NOS3 gene correlate with cardiovascular health status. Individuals carrying the 'T' variant of rs1799983 produce less NO which leads to a higher risk of coronary heart disease and heart attack. In specific populations the 'GG' genotype has been shown to negatively affect heart performance. The 'C' allele of rs2070744 blocks NOS3 production while the 'T' variant of this polymorphism correlates with myocardial infarction. The genetic variants present in individuals can affect multiple cardiovascular metrics including blood pressure levels, arterial rigidity and cholesterol concentration as well as surgical and therapeutic outcomes for heart conditions. Research has revealed connections between these genetic variants and athletic performance as well as their influence on migraine occurrences and dietary responses including omega-3 fatty acids and olive oil. The Precision Health & Wellness tests created by PlexusDx enable you to learn about your genetic predispositions which can guide you to make knowledgeable health choices. A genetic profile examination enables you to understand your cardiovascular health better and implement strategies to reduce possible risks. Consider investigating how your genetic makeup affects your heart health and general wellness by using the Precision Health & Wellness tests from PlexusDx.com available at both Amazon and Walmart. Today take control of your health path by unlocking the benefits of personalized genetic information.

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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