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.

The Importance of Phenylalanine in Maintaining Health

The personalized health report service PlexusDx delivers important information about genetic traits which affect your health. Our exploration today focuses on phenylalanine which stands out as an essential amino acid vital for multiple bodily functions. This report will examine the importance of phenylalanine as well as its roles in maintaining brain and skin health while also considering how genetic factors determine its metabolic processes. The human body requires phenylalanine from food because it functions as a protein building block and helps produce dopamine, adrenaline, and thyroid hormones. This amino acid maintains critical functions in brain health and cognition as well as skin health and thyroid function while regulating appetite. A balanced diet provides phenylalanine because eggs, dairy products, legumes, meats, fish and nuts contain high levels of this amino acid. People rarely experience phenylalanine deficiency which generally occurs alongside genetic conditions such as phenylketonuria but high phenylalanine concentrations can detrimentally impact mental states and cognitive abilities. Genetic differences in genes such as PAH which manage phenylalanine metabolism produce various individual reactions to phenylalanine. The significance of phenylalanine is acknowledged but scientific proof connecting genetic tendencies to phenylalanine imbalances is still scarce. The scientific community needs additional investigation to reach definitive conclusions about this subject. Although genetic factors play a role in phenylalanine metabolism processes, phenylalanine imbalances do not frequently occur in most people. Those who want to understand their genetic predisposition to phenylalanine metabolism can learn through Precision Health & Wellness tests from PlexusDx. A deeper understanding of genetic influences on phenylalanine levels enables you to select dietary and lifestyle options that promote the best health results. Phenylalanine acts as an essential element throughout numerous bodily processes which demonstrates the complex relationship between genetic factors and nutritional needs. People who utilize PlexusDx's genetic testing services obtain valuable insights into their genetic makeup which enable them to make informed health decisions to improve their well-being. Start your journey toward better health today by checking out the Precision Health & Wellness tests offered through PlexusDx.com, Amazon, and Walmart.

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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