Daily yogurt to support immune function in healthy adults
Official title: Randomized, Double-Blind, Controlled Study on the Effects of Continuous Yogurt Intake on Immunomodulatory Function and Subjective Health Status in Healthy U.S. Adults
Run by Meiji Co., Ltd. · NCT07799207 · Data updated 2026-11-12
Healthy adults will try daily yogurt or a placebo for 8 weeks to see if it affects saliva immune markers and how they feel.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 118 (estimated) |
| Sponsor | Meiji Co., Ltd. Industry-sponsored |
| Locations | 1 site (Chicago, Illinois) |
| Status | Recruiting |
| Started | September 14, 2026 |
| Main results expected | June 28, 2027 |
| Study ends | June 28, 2027 |
| Registry record updated | September 3, 2026 |
| Trial ID | NCT07799207 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults 18-65 in good health who can commit to daily yogurt consumption for 8 weeks and meet all inclusion criteria.
✕Probably not a fit
Individuals with milk allergy or certain dietary restrictions may not benefit and may be ineligible for participation.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This randomized, double-arm study tests whether daily yogurt consumption influences immune function and subjective health in healthy adults in the United States. Participants are randomly assigned to active yogurt or a placebo for 8 weeks, with immune markers such as salivary immunoglobulin A and other biomarkers measured. The study also tracks cold-like symptoms, quality of life, GI symptoms, stress, and sleep. Eligibility includes adults 18-65 in good health who can commit to daily product use and follow study instructions. The sponsor is Meiji Co., Ltd., with Atlantia Clinical Trials as the site in Chicago, IL.
Why it matters
Potential benefit: If successful, daily yogurt could support immune health and overall well-being in healthy adults.
How similar studies have gone: Previous probiotic yogurt studies have shown potential effects on immune markers in some populations, but results vary by formulation and population.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Be able to give written informed consent. * Be between 18-65 years, inclusive. * Be in general good health, as determined by the in investigator. * Willing to consume study product daily for the duration of the study. * Has a body mass index (BMI) ≤39.9 kg/m2 * Willing to refrain from consuming alcohol for the 24 hours prior to each study visit. * Willing to maintain current lifestyle habits, including dietary and caffeine and alcohol intake, for the duration of the study. Exclusion Criteria: * Participants who are pregnant or wish to become pregnant during the study or who are lactating and/or currently breastfeeding. * Participants currently of biological childbearing potential, but not using a continuous effective method of contraception. * Has a history of drug and/or alcohol abuse at the time of enrolment. * Drinks more than nationally recommended units of alcohol per day/week. * Has milk allergy or other food allergies or other issues with foods that would preclude intake of the SP. * Has an excessive smoking habit. * Has any significant acute or chronic coexisting health conditions that would prevent them from fulfilling the study requirements, put the participant at risk or would confound the interpretation of the study results as judged by the investigator on the basis of medical history and laboratory test results. * Dental or intraoral treatment. * Visited a hospital or clinic for allergic rhinitis (pollinosis) within the past year or those who plan to take prescription drugs to treat or prevent allergic rhinitis during the study period. * Current or recent (in the past 4 weeks) use of a medication that the investigator believes would interfere with the objectives of the study or pose a safety risk or confound the interpretation of the study results. * Current or recent (in the past 4-weeks) use of prohibited nutritional or non-nutritional dietary supplements that the investigator believes would interfere with the objectives of the study or pose a safety risk or confound the interpretation of the study results. * Current or recent (in the past 2 weeks) use of yogurt (other than the study product) * Participants who have donated blood in the previous 8-weeks. * Individuals who, in the opinion of the investigator, are considered to be poor attendees or unlikely for any reason to be able to comply with the study. * Participants may not be participating in other clinical studies. If the participant has previously taken part in an experimental study, the Investigator must ensure sufficient time has elapsed before entry to this study to ensure the integrity of the results.
Where it's running
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Atlantia Clinical Trials
Chicago, Illinois, United States Recruiting
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.