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CompletedNCT04847349Updated Feb 1, 2022

Live Microbials to Boost Anti-Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) Immunity Clinical Trial

An interventional study of OL-1, standard dose and OL-1, high dose in Covid19, sponsored by Rutgers, The State University of New Jersey. Completed at 1 site in United States. Open to participants aged 18 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-02-01.

Sponsored by Rutgers, The State University of New Jersey · Not applicable, Interventional, and Basic science

Phase
Not applicable
Study type
Interventional
Enrollment
54
Allocation
Randomized
Ages
18 Years to 60 Years
Sex
All
01

Study summary

This pilot double-blind randomized controlled trial will test the preliminary efficacy of two doses of a combination of live microbials (probiotics) given to boost the immunity of unvaccinated persons previously infected with SARS-CoV-2.

Read the detailed description

This pilot double-blind randomized controlled trial will test the preliminary efficacy of two doses (a standard dose and a high dose) of a combination of live microbials (probiotics), currently marketed in food (including products labeled as dietary supplements), given daily for 21 days to boost the immunity of unvaccinated, generally healthy persons ages 18-60 with prior confirmed SARS-CoV-2 infection. Data collected will include demographics, comorbidities, medications, information about prior SARS-CoV-2 infection, and self-reported symptoms and adverse events (AEs). Biospecimens (saliva, nasal wash, blood, and stool) will be collected at baseline and days 21 and 42 for analysis.

02

Conditions studied

  • Covid19

Keywords

  • Probiotics
03

In context

Lead sponsor

Rutgers, The State University of New Jersey is the lead sponsor of 496 studies on the registry; 130 are open to participants now.

Of its 38 completed or terminated interventional studies of FDA-regulated products, 30 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Healthy adults (any gender, ages 18 to 60 years old) in good general health, based on medical history
  • SARS-CoV-2 infection >4 months prior confirmed by a positive polymerase chain reaction (PCR) or antigen test
  • Body mass index (BMI) of 18.5-39.9 kg/m2
  • Agreement to comply with the protocol and study restrictions
  • Access to internet in addition to willingness and ability to use web-based questionnaires
  • Available for all study visits
  • English-speaking

Exclusion criteria

Exclusion Criteria:

  • Recent infection with coronavirus disease-2019 (COVID-19) (newly positive PCR or antigen test within prior 4 months)
  • Prior receipt of antibody therapies (convalescent or monoclonal) towards COVID-19
  • Prior receipt of vaccines against COVID-19
  • Prior or current participation in a clinical trial of vaccines against COVID-19
  • Scheduled to receive a vaccine against COVID-19 in the following month
  • Regular use of any live microbial (probiotic) supplements
  • Any acute or chronic respiratory tract disease besides mild to moderate asthma
  • Any diagnosed immunodeficiency
  • Current use of immunosuppressive drugs
  • Any diagnosis of chronic gut disease, such as inflammatory bowel disease or irritable bowel syndrome
  • Pregnancy or breastfeeding
  • Recent use of antibiotics
  • Current addiction to alcohol, drugs, or medications
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
54 participants (actual)

Study arms

  • Experimental
    Live microbial (Probiotic) consortium OL-1, standard dose

    Combination of a standard dose of live microbials (probiotics) taken as a capsule once per day with breakfast for 21 days. Capsules should not be consumed with hot drinks or alcohol.

    Dietary Supplement: OL-1, standard dose

  • Experimental
    Live microbial (Probiotic) consortium OL-1, high dose

    Combination of a high dose of live microbials (probiotics) taken as a capsule once per day with breakfast for 21 days. Capsules should not be consumed with hot drinks or alcohol.

    Dietary Supplement: OL-1, high dose

  • Placebo comparator
    Placebo for live microbial (probiotic) consortium

    Capsule containing inactive ingredients such as a product of potato starch (maltodextrin), but no probiotics, taken once per day with breakfast for 21 days.

    Dietary Supplement: Placebo

Interventions

  • Dietary supplementOL-1, standard dose

    The live microbial components have been present in the food supply, have a long history of safe use in foods, and are already marketed in the United States.

  • Dietary supplementOL-1, high dose

    The live microbial components have been present in the food supply, have a long history of safe use in foods, and are already marketed in the United States.

  • Dietary supplementPlacebo

    Capsule containing inactive ingredients such as a product of potato starch (maltodextrin), but no probiotics.

06

What researchers measure

Primary outcomes

  1. Change in titer of serum anti-SARS-CoV-2 immunoglobulin G (IgG)

    Time frame: between baseline and day 21 (day 1 is the first day of taking the investigational product)

Secondary outcomes

  1. Change in the titer of serum anti-SARS-CoV-2 IgG

    Time frame: between baseline and day 42

  2. Change in the titer of serum anti-SARS-CoV-2 neutralizing antibody

    Time frame: between baseline and days 21 and 42

  3. Change in the titer of serum and nasal anti-SARS-CoV-2 immunoglobulin A (IgA) antibody

    Time frame: between baseline and days 21 and 42

  4. In-vitro changes in cytokine release in response to stimulation of peripheral blood mononuclear cells with SARS-CoV-2 peptides

    Time frame: between baseline and days 21 and 42

  5. Serum cytokine levels

    Time frame: between baseline and days 21 and 42

  6. Adverse events

    Time frame: up to 10 weeks

  7. Change in any baseline symptoms from prior SARS-CoV-2 infection

    Time frame: up to 6 weeks

  8. New (repeat) SARS-CoV-2 infections

    Time frame: up to 6 weeks

07

Study locations

1 site
  • Rutgers University
    New Brunswick, New Jersey 08901, United States
08

References and documents

Individual participant data

Plan to share: Yes — Saliva, nasal rinse, blood samples, and stool samples collected will be used for the purposes of this research. After information that could identify consenting participants has been removed, de-identified information and left over biospecimens collected for this research may be used by or distributed to the study funder (Danisco USA Inc.) or to investigators for other research without obtaining additional informed consent. Personal identifying details, such as name and date of birth, will not be shared without participants' additional permission.

Supporting information: Study protocol, Sap, Icf, Csr

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 1, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04847349
Lead sponsor
Rutgers, The State University of New Jersey
Collaborators
Vault Health, Inc., Danisco USA Inc.
Responsible party
Daniel B. Horton, MD, MSCE (Assistant Professor of Pediatrics and Epidemiology, Rutgers, The State University of New Jersey) — Principal investigator
First posted
Apr 19, 2021
Start date
Apr 13, 2021
Primary completion
Nov 1, 2021
Completion
Jan 31, 2022
Last update
Feb 1, 2022

Study contacts

Daniel B Horton, MD, MSCE
principal investigator · Rutgers University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jan 2022. You cannot join it, but the record below documents what was studied.

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