# Exploring the Mechanisms of Indoxyl Sulfate Production by Oral Tryptophan Challenge Test

> **NCT04117191** · NA · COMPLETED · sponsor: **Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation** · enrollment: 42 (actual)

## Conditions studied

- Healthy
- Chronic Kidney Diseases

## Interventions

- **DIETARY_SUPPLEMENT:** Doctor's Best L-Tryptophan

## Key facts

- **NCT ID:** NCT04117191
- **Lead sponsor:** Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2019-10-01
- **Primary completion:** 2019-11-30
- **Final completion:** 2019-11-30
- **Target enrollment:** 42 (ACTUAL)
- **Last updated:** 2019-12-10


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04117191

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04117191, "Exploring the Mechanisms of Indoxyl Sulfate Production by Oral Tryptophan Challenge Test". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04117191. Licensed CC0.

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