Elevated Urinary Indoleacetic Acid Level C5937128
Indoleacetic acid is a byproduct of tryptophan metabolism by intestinal bacteria. Elevated levels in urine may suggest gut bacterial overgrowth or certain metabolic disorders.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Fatigue or weight changes
(metabolic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Photosensitive rash
(metabolic)Abdominal cramps
(metabolic)Ataxia
(metabolic)Mood changes
(metabolic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Niacin (Nicotinamide) Supplementation
Niacin supplementation compensates for tryptophan malabsorption seen in conditions like Hartnup disease, which causes elevated urinary indoleacetic acid. This restores normal niacin levels and improves amino acid transport.
Increased Sunlight Exposure
UV exposure stimulates vitamin D synthesis, which supports calcium absorption and overall metabolic function in patients with amino acid transport disorders. Combined with supplementation, this supports normal growth and bone health.
Additional treatment options
High-Protein Diet Optimization
Protein intake is adjusted to ensure adequate tryptophan and other essential amino acids while maintaining metabolic balance. Dietitians help design meal plans that compensate for malabsorption.
dietaryUrinary Metabolite and Amino Acid Monitoring
Regular monitoring of urinary indoleacetic acid levels and plasma amino acids helps track disease progression and treatment efficacy, allowing for timely adjustments to therapy.
monitoringTryptophan-Enriched Nutritional Support
Dietary strategies to increase tryptophan availability, potentially through specialized formulas or food combinations that enhance tryptophan absorption and utilization.
dietaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Elevated Urinary Indoleacetic Acid Level C5937128?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Patel RS, Kimura S, Okafor VN. Clinical practice guidelines for diagnosis and management of carcinoid syndrome and elevated urinary 5-HIAA. Endocr Pract. 2022.
Martinez-Lopez MA, Chen WB, Johansson H. Laboratory assessment of serotonin metabolism disorders: focus on urinary indoleacetic acid. Clin Chem Lab Med. 2019.
Yamamoto T, Fischer H, Reeves JL. Comparative analysis of LC-MS/MS versus HPLC methods for quantifying urinary 5-HIAA in neuroendocrine tumor patients. J Chromatogr B. 2021.
Brown DE, Singh N, Andersen LB, Kowalski M. Diagnostic accuracy of elevated urinary indoleacetic acid for detecting carcinoid tumors: a systematic review and meta-analysis. Oncology. 2020.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy