Organix Comprehensive Profile - Urine

p-Hydroxyphenylacetate

Optimal Result: 0 - 34 mcg/mg creatinine.

p-Hydroxyphenylacetate is a tyrosine metabolic product of certain Clostridia bacteria. Elevated levels are associated with Clostridia overgrowth, small intestinal bowel overgrowth (SIBO), or small bowel disease. May also indicate celiac disease.

For individuals with normal, healthy intestinal function, the compound p-Hydroxyphenylacetate should not appear as more than background concentrations in urine.

Measurement of 4-hydroxyphenylacetic acid excretion in urine is useful in screening for diseases of the small intestine associated with bacterial overgrowth.

References:

- http://www.hmdb.ca/metabolites/HMDB0000020

- https://www.ncbi.nlm.nih.gov/pubmed/476929

What does it mean if your p-Hydroxyphenylacetate result is too high?

High 4-Hydroxyphenylacetic acid may be associated with small intestinal bacteria overgrowth (SIBO) due to its production by:

- C. difficile

- C. stricklandii

- C. lituseburense

- C. subterminale

- C. putrefaciens

- C. propionicum

C. difficile can be distinguished from the other species by its production of 4-cresol. No other Clostridia species produce 4-cresol.

Elevated values of 4-hydroxyphenylacetic acid are common in:

- Celiac disease

- Cystic fibrosis

- Jejuna web

- Transient lactose intolerance

- Giardia infection

- Ileal resection

- Ileo-colic intersusseception

- Septicemia

- Projectile vomiting.

Elevations of 4-hydroxyphenylacetic acid in celiac disease and cystic fibrosis are common enough to suggest that these Clostridia bacteria may play a role in these illnesses.

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