Optimal Result: 35.8 - 76.9 umol/L.

Phenylalanine is a precursor for the amino acid tyrosine, which is essential for making neurotransmitters (e.g. epinephrinenorepinephrinedopamine) and thyroid hormone. Neurotransmitters are the chemicals that communicate between nerve cells in the brain. It can relieve pain, alleviate depression, and suppress the appetite. Low levels may indicate a stressful lifestyle, leading to memory loss, fatigue, and depression.

Phenylalanine is a large neutral amino acid necessary for normal growth and development and is required for protein synthesis in humans. Phenylalanine is metabolized into acetoacetic acid and fumaric acid via tyrosine. A tyrosine metabolite, DOPA, is converted into the neurotransmitters epinephrine and norepinephrine. A lack of these neurotransmitters is a causal factor in Parkinson disease and schizophrenia.

References:

-https://www.mayoclinic.org/diseases-conditions/phenylketonuria/symptoms-causes/syc-20376302

-https://www.sciencedirect.com/science/article/pii/S1096719213003363

-https://www.sciencedirect.com/science/article/pii/B9780123749277000066

What does it mean if your Phenylalanine result is too low?

Low phenylalanine may be due to a stressful lifestyle and lead to symptoms of hypothyroidism and chronic fatigue. Low levels can result in altered thyroid function and catecholamine deficits including symptoms of depression, cognitive disorders, memory loss, fatigue, and autonomic dysfunction. Reduce lifestyle stressors and supplement phenylalanine.

What does it mean if your Phenylalanine result is too high?

High levels of phenylalanine may be due to excessive protein intake or a metabolic block in the conversion of phenylalanine to tyrosine. Iron, vitamin C, and niacin are necessary for this enzymatic step. Check tyrosine level and, if low, supplement tyrosine and iron.

In rare cases, high phenylalanine build up in the body can also be due to an inherited disorder called Phenylketonuria. It is caused by a defect in the gene that helps create the enzyme needed to break down phenylalanine.

10 000+ happy clients
100% satisfaction
★★★★★ customer support

Understand blood, stool, and urine medical results from your labs.

Get 10% off your plan.

Use promocode

Advanced Plan personal plan


  • Yearly subscription
  • Instant interpretation
  • We upload five reports for you
  • Use the free self-upload form
  • 2500+ biomarkers explained
  • Nutrition Recommendations
  • Online support
  • Cancel anytime

Own It For Life premium personal plan


  • No subscription
  • Unlimited access
  • Unlimited storage
  • Instant interpretations
  • We upload ten reports for you
  • Use the free self-upload form
  • 2500+ biomarkers explained
  • Nutrition Recommendations
  • Dedicated support

Pro Plan for health professionals


  • Track multiple clients results
  • No setup fees
  • No hidden costs
  • Cancel anytime
  • Instant interpretations
  • Use the free template forms
  • 2500+ biomarkers explained
  • Additional team member $25
  • Personal training and support

Healthmatters.io software for professional use.

Welcome to Healthmatters Pro.

Save time on interpreting lab results with the largest database of biomarkers online. In-depth research on any test at your fingertips, all stored and tracked in one place.

Learn More


We implement proven measures to keep your data safe.

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.

General Data Protection Regulation (GDPR). HIPAA compliance for healthcare professionals
×

Understand Your Lab Result Now

  • Instant interpretation
  • 2500+ biomarkers explained
  • Science-based recommendations
  • Online support
  • Secure and private portal

Get 10% off with promocode:

;