Tryptophan Metabolism Alterations study: L-Tryptophan vs Freedom SimpleCap Powder
Official title Tryptophan for Impaired AhR Signaling in Celiac Disease
ClinicalTrials.gov ID: NCT05576038
What this study is testing
What is L‑Tryptophan?
an investigational oral supplement being studied as a potential treatment for persistent symptoms in celiac disease patients who do not respond to a gluten‑free diet is designed to increase the amount of tryptophan available for gut microbes to produce AhR‑activating indole metabolites that may support gut integrity
Plain-language explanation of the investigational treatment. It is being studied and is not an approved or proven therapy. The study team can confirm the details.
- What it's testing
- The study wants to see if taking L‑tryptophan can change celiac‑related symptoms in people whose symptoms do not improve on a gluten‑free diet.
- Who it's for
- Adults age 18‑75 with biopsy‑confirmed celiac disease, on a gluten‑free diet for over a year, and with a high symptom score.
- What's involved
- Participants will be randomly assigned to take either L‑tryptophan or a placebo for three weeks, without knowing which they receive.
- Time commitment
- The trial lasts three weeks and includes the supplement period plus study visits for randomization and follow‑up.
- You might receive a placebo (an inactive treatment) instead of the study drug, decided by chance. You may not know which one you got.
A plain-language read of the study's public ClinicalTrials.gov listing. The study team confirms the details.
Who can take part
Ages 18 to 75
You may be able to join if
- 18 and 75 years of age
- Celiac disease (CeD) diagnosis: Individuals with histological and serological evidence of CeD serology (positive biopsy and anti-tTG IgA)
- Persistent CeD related symptoms (\>40 on the Celiac Symptom Index) despite \>1 year of a gluten free diet (GFD)
You likely can't join if
- Acid anti-secretory and antacid medications
- Antibiotics, antibacterial agents or probiotics, currently, or within the last 8 weeks
- Current organic gastrointestinal or other autoimmune diseases, such as inflammatory bowel disease or diabetes mellitus (type 1)
- Lactose and/or fructose intolerance
- History of bariatric surgery, fundoplication or gastrectomy (partial or complete)
- Connective tissue disease
See the full eligibility criteria
- 18 and 75 years of age
- Celiac disease (CeD) diagnosis: Individuals with histological and serological evidence of CeD serology (positive biopsy and anti-tTG IgA)
- Persistent CeD related symptoms (\>40 on the Celiac Symptom Index) despite \>1 year of a gluten free diet (GFD)
- Acid anti-secretory and antacid medications
- Antibiotics, antibacterial agents or probiotics, currently, or within the last 8 weeks
- Current organic gastrointestinal or other autoimmune diseases, such as inflammatory bowel disease or diabetes mellitus (type 1)
- Lactose and/or fructose intolerance
- History of bariatric surgery, fundoplication or gastrectomy (partial or complete)
- Connective tissue disease
- Concurrent organic GI pathology other than benign polyps, haemorrhoids, lipomas, Helicobacter pylori infection, diverticulosis and melanosis coli
- Chronic treatment with high dose opioids
- Alcohol or drug abuse
- Concurrent systemic disease and/or laboratory abnormalities considered by investigators to be a risk or that could interfere with data collection
- Allergy or sensitivity to any component of the study medication or placebo
- Use of lithium and monoamine oxidase inhibitors (MAOIs)
- Participation in another dietary treatment study within the last 4 weeks
The study team makes the final eligibility decision.
Where it is enrolling
- Hamilton, Ontario, Canada
Questions & answers
Do participants get paid in this trial?
This listing doesn't specify compensation. Many trials still reimburse travel or offer a stipend, so it's worth asking the study team when you connect.
Is it free to join, and do I need insurance?
Searching and applying through BridgeMD is free. In clinical trials the study-related treatment and visits are generally provided at no cost to you. You usually don't need insurance to take part, but confirm specifics with the study team.
How long does this study last?
The listing doesn't state an exact length. The study team walks you through the schedule and number of visits before you decide to enroll.
Who can join this trial?
This study is enrolling all sexes, 18 years to 75 years. The study team makes the final eligibility decision.
Where is this trial taking place?
This study is enrolling now at Hamilton, Ontario, Canada. Enter your location above to see the nearest enrolling site and check your eligibility.
Explore other conditions
BridgeMD is an information and trial-matching tool that is independent of the study sponsor. Details come from ClinicalTrials.gov. The study team decides eligibility, and your own doctor gives medical advice.