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 Connection Between Genetics and Nutrition

PlexusDx stands out as a premier provider of personalized health reports by revealing genetic traits that affect multiple aspects of your well-being. In our current exploration of genetics and nutrition we study the FGF21 gene and understand how it affects diet choices and macronutrient preferences. The FGF21 gene produces a hormone that regulates glucose and fat metabolism and determines nutrient processing in our bodies. The variants of this gene explain why people have different preferences for macronutrients which helps to understand their food inclinations. FGF21 which originates mainly from the liver affects insulin sensitivity and enhances fatty acid oxidation according to scientific studies. This hormone boosts energy production processes and facilitates cold temperature adaptation because brown fat tissue serves as an important production site for FGF21. FGF21 analog research has shown beneficial effects on weight control and improvements in blood lipid profiles as well as liver fat and glucose metabolism despite reduced FGF21 activity being linked to obesity and metabolic disorders. The connection between FGF21 and macronutrient preferences offers compelling insights but demands careful consideration of genetic data. Limited evidence supports the genetic model for FGF21 which necessitates additional research to develop definite conclusions about its influence on dietary decisions. The study of genetic variations in genes like FGF21 enhances our ability to create personalized dietary guidelines to meet specific needs of individuals. Individuals who utilize genetic testing results can increase their understanding of nutrient processing in their bodies which helps them to make educated health decisions. PlexusDx delivers Precision Health & Wellness tests which supply comprehensive information about genetic traits including FGF21 to those researching the link between genetics and nutrition. The power of genetic information enables individuals to begin a personalized health journey that respects their unique genetic composition while enabling well-informed dietary and lifestyle choices. The FGF21 gene stands as a compelling subject within genetic and nutritional research because it reveals how genetic differences affect metabolic processes and macronutrient choices. Through understanding genetic testing options individuals can actively enhance their health outcomes and overall wellness. Begin your journey toward individualized health management with PlexusDx Precision Health & Wellness tests which you can find at PlexusDx.com as well as on Amazon and Walmart. Use genetic insights to guide your dietary choices and lifestyle for improved well-being.

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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