FARE - Food Allergy Research & Education Logo

A Study of Detergents in the Pathogenesis of Eosinophilic Esophagitis

Study Purpose

The purpose of this research is to determine if detergents in everyday products such as toothpaste make the lining of the esophagus leaky and cause allergic inflammation.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Normal, healthy volunteers.
  • - Able to swallow pills.

Exclusion Criteria:

  • - Personal history of esophageal disease including but not limited to eosinophilic esophagitis, esophageal dysmotility, or GERD/reflux.
  • - History of dysphagia (i.e., difficulty swallowing), chronic vomiting, chronic abdominal pain, unintentional weight loss.
  • - Celiac disease, inflammatory bowel disease, irritable bowel syndrome, esophageal varices, chronic aspiration, connective tissue disorder, or known parasitic infection.
  • - Gelatin allergy.
  • - Use of a toothpaste containing SLS within 2 weeks of the study.
  • - Pregnancy.

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Mayo Clinic
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Benjamin Wright, MD
Principal Investigator Affiliation Mayo Clinic
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Active, not recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Eosinophilic Esophagitis
Study Website: View Trial Website
Arms & Interventions


Experimental: Toothpaste detergents with Eosinophilic Esophagitis Testing

Subjects will complete an esophageal string test prior to and after completing a high resolution esophageal manometry then brushing their teeth using Colgate toothpaste.


Diagnostic Test: - Esophageal String Test (EST)

Non-invasive, FDA-registered sampling method to evaluate eosinophilic inflammation in the esophagus. The EST is performed by having an individual swallow a capsule attached to a string which captures secretions from the esophagus. The end of the string is taped to the cheek and the capsule is swallowed with water. After 1 hour, the EST will be removed, and the string will be processed for laboratory analysis.

Other: - Colgate

2 grams of toothpaste (pea sized amount) for 2 minutes

Diagnostic Test: - High Resolution Esophageal Manometry (HREM)

Thin flexible tube with sensors placed in the nose and swallowed for esophagus placement to conduct reading regarding the lining of the esophagus taken for approximately 10 minutes

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Mayo Clinic Arizona, Scottsdale, Arizona



Mayo Clinic Arizona

Scottsdale, Arizona, 85259

The content provided on clinical trials is for informational purposes only and is not a substitute for medical consultation with your healthcare provider. We do not recommend or endorse any specific study and you are advised to discuss the information shown with your healthcare provider. While we believe the information presented on this website to be accurate at the time of writing, we do not guarantee that its contents are correct, complete, or applicable to any particular individual situation. We strongly encourage individuals to seek out appropriate medical advice and treatment from their physicians. We cannot guarantee the availability of any clinical trial listed and will not be responsible if you are considered ineligible to participate in a given clinical trial. We are also not liable for any injury arising as a result of participation.