Bifidobacterium Infantis NLS Super Strain for Celiac Disease Patients on a Gluten-free Diet With Persistent Gastrointestinal Symptoms

Study Purpose

The primary purpose of this randomized, double-blinded, placebo-controlled, crossover clinical trial is to evaluate the efficacy of dietary supplementation with Bifidobacterium infantis NLS super strain among celiac disease patients on a gluten-free who have persistent gastrointestinal symptoms.

Recruitment Criteria

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

Accepts Healthy Volunteers

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.

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

Inclusion Criteria:

  • - Men or women at least 18 years of age - Precise diagnosis of celiac disease: serology (a-tTG IgA and/or DGP IgG and/or EmA) and histology (Marsh IIIa or greater) concordantly positive, confirmed at investigator's institution - Consuming a gluten-free diet for at least 2 years - Persistent gastrointestinal symptoms: global GSRS questionnaires ≥2 or ≥ 3 points for any of the 5 sub-dimensions - Signature of informed consent

    Exclusion Criteria:

    - Patients not interested or unable to comply with questionnaires and collection of samples of blood, feces, and urine - Complicated celiac disease (refractory, ulcerative jejunoileitis, lymphoma) - Concomitant pathologies that are uncompensated or untreated (Type I or II diabetes mellitus, hyperthyroidism, hypothyroidism, diarrhea due to bile salts, pancreatic insufficiency, bacterial overgrowth) - Consumption within the 2 weeks prior to study enrollment of medication that interferes with bowel functioning (antibiotics, NSAIDs, laxatives, metformin, opiates, anticholinergics [atropine, antidepressants, neuroleptics, antipsychotics, antiparkinsonians], anticonvulsants, antihistamines, antihypertensives [calcium antagonists, clonidine, diuretics, metal ions (aluminum), antacids, sucralfate, barium sulfate, bismuth, calcium, iron, heavy metals (arsenic, lead, mercury)], resins (cholestyramine), or any other medication deemed relevant by the investigator).
- Women that are pregnant or may become pregnant during the study

Trial Details

This trial id was obtained from, 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.

Trial ID:

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.

Phase 2

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

Lead Sponsor
Global Institute of Probiotics

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

Principal Investigator
Edgardo Smecuol, MDJulio C Bai, MD
Principal Investigator Affiliation Dr. C. Bonorino Udaondo Gastroenterology HospitalDr. C. Bonorino Udaondo Gastroenterology Hospital

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

Agency Class
Overall Status Recruiting
Countries Argentina

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

Celiac Disease
Additional Details

Most patients with celiac disease demonstrate substantial clinical improvement during the first few weeks after the onset of the consumption of a gluten-free diet. However, between 30-50% of patients with celiac disease have persistent gastrointestinal symptoms despite consuming a gluten-free diet and presenting negative antibodies. It has recently been reported that celiac disease patients treated with a gluten-free diet that still have persistent symptoms possess different intestinal microbiota patterns than patients without persistent symptoms. Furthermore, a pilot study showed that dietary supplementation with probiotics (Bifidobacterium infantis NLS super strain

  • - Natren LIFESTART®) in untreated celiac disease patients was associated with a significant improvement in symptoms as compared to placebo.
Collectively, these findings contribute to the hypothesis that celiac disease patients on a gluten-free diet in whom gastrointestinal symptoms persist may benefit from the supplementation of Bifidobacterium infantis NLS super strain. Participants in this double-blinded crossover trial will be randomized to receive either placebo or Bifidobacterium infantis NLS super strain for 3 weeks, followed by a 2 week washout period, and then followed by 3 weeks of the other of either placebo or probiotic supplementation.

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.

International Sites

Buenos Aires, Argentina




Small Bowel Section, Department of Medicine, Dr. C. Bonorino Udaondo Gastroenterology Hospital

Buenos Aires, ,

Site Contact

Edgardo Smecuol, MD


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