Metabolic Analysis Markers (Urine)

3-Hydroxyphenylacetic Acid

Optimal Result: 0 - 8.1 mmol/mol creatinine.

3-Hydroxyphenylacetic acid is a normal metabolic product of dietary phenols and flavonoids. Common foods such as teas, fruits, (orange juice) supplements, particularly quercetin and grape seed extract contribute much of what is typically found in the urine. A result of action by the colonic bacterial flora, it is a major metabolite, with up to 35% of ingested quercetin rutinosides resulting in 3HPAA. 3-Hydroxyphenylacetic acid is a rutin metabolite and an antioxidant. It has a protective biological activity in human. It is a substrate of enzyme 4-hydroxyphenylacetate 3-monooxygenase in the pathway tyrosine metabolism. 3-Hydroxyphenylacetic acid is found to be associated with phenylketonuria, which is an inborn error of metabolism. It is also a marker of gut Clostridium species.

What does it mean if your 3-Hydroxyphenylacetic Acid result is too high?

High levels of 3-HPAA in the urine reflect an increased intake of food compounds such as teas, fruits, (orange juice) supplements, particularly quercetin and grape seed extract or possibly a colonic flora population that results in enhanced phenol and flavonoid metabolism.

Higher levels are associated with higher levels of Clostridia. Clostridia bacteria are commonly found in the gut-microbiome. Overuse of antibiotics can cause imbalance of the gut microbiome, leading to overgrowth of the species Clostridioides difficile causing a serious infection. Effects of this infection can lead to severe diarrhea and also the increase in severity of many bowel related diseases is also increased as a results of the infection. Other Clostridia bacteria in the gut have been linked to brain connectivity and healthy function.

3-Hydroxyphenylacetic acid can also be found in Klebsiella. Klebsiella organisms can lead to a wide range of disease states, notably pneumonia, urinary tract infections, sepsis, meningitis, diarrhea, and soft tissue infections.

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

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

Essential Plan


  • Monthly subscription
  • Instant interpretation
  • Use the free self-upload form
  • Additional charge for upload service
  • 2000+ biomarkers explained
  • Recommendations
  • Cancel anytime

Advanced Plan


  • Yearly subscription
  • Instant interpretation
  • We upload five reports for you
  • Use the free self-upload form
  • 2000+ biomarkers explained
  • Nutrition Recommendations
  • Online support
  • Cancel anytime

Own It For Life premium plan


  • No subscription
  • Unlimited access
  • Unlimited storage
  • Instant interpretations
  • We upload ten reports for you
  • Use the free self-upload form
  • 2000+ biomarkers explained
  • Nutrition Recommendations
  • Dedicated 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
  • 2000+ biomarkers explained
  • Science-based recommendations
  • Online support
  • Secure and private portal

Get 10% off with promocode:

;