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A study to confirm the effect of lactic acid bacteria intake on improving immune function - Randomized, double-blind, placebo-controlled, parallel-group comparison method -

A study to confirm the effect of lactic acid bacteria intake on improving immune function - Randomized, double-blind, placebo-controlled, parallel-group comparison method - - A study to confirm the effect of lactic acid bacteria intake on improving immune function

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000049616
Enrollment
200
Registered
2024-06-29
Start date
2023-01-23
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy adults

Interventions

Sponsors

KSO Corporation
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1) Healthy Japanese males and females from 20 to 65 years old. 2) Subjects who have received sufficient explanation of the purpose and content of the study, have the capacity to consent, have voluntarily volunteered to participate based on a good understanding of the study, and have agreed to participate in the study in writing.

Exclusion criteria

Exclusion criteria: Subjects-- 1) suffering from, undergoing treatment, or with a history of diabetes, renal or hepatic disease, or other serious illness, thyroid disease, adrenal gland disease, psychiatric disease, autoimmune disease, or other metabolic disease. 2) who cannot stop taking foods containing lactic acid bacteria, bifidobacteria, oligosaccharides, or other bacteria during the study period. 3) who regularly use foods that may affect immunity. 4) who constantly consumes more than the appropriate amount of alcohol. 5) who are unable to abstain from alcohol for 2 days prior to each test. 6) who have declared having food allergies. 7) with a history of gastrointestinal diseases or gastrointestinal surgery (except appendicitis). 8) who are pregnant, breast feeding, or planning to be pregnant during the study period. 9) with a history or current history of drug or alcohol dependence. 10) who are participating or intend to participate in other studies involving the use of other foods, drugs or cosmetics. 11) who regularly use medicines that may affect immunity, or who are unable to stop taking them during the study period. 12) with hay fever, atopic dermatitis, allergic rhinitis, bronchial asthma, or chronic bronchitis. 13) who have oral problems that involve bleeding, or plan to undergo dental or oral treatment. 14) who engage in strenuous exercise. 15) who plan to travel abroad during the study period. 16) who have taken antibiotics within 1 month of the screening test. 17) who smoke. 18) who have donated more than a certain amount of blood drawn or component blood within 3 months prior to the date of obtaining consent. 19) who work in day and night shifts, late at night, or who are full telecommuters or blue-collar workers. 20) who are diagnosed with dry mouth. 21) who have not had any cold-like symptoms within the last year. 22) with BMI less than 18.5 or greater than 30.0. 23) who are determined to be inappropriate as research subjects by the principal investigator--.

Design outcomes

Primary

MeasureTime frame
cold-like symptoms questionnaire

Secondary

MeasureTime frame
pDC activity, mDC activity, salivary sIgA, NK cell activity at 4 weeks after intake pDC activity, mDC activity, salivary sIgA, NK cell activity at 8 weeks after intake POMS-2

Countries

Japan

Contacts

Public ContactEiji Yoshikawa

KSO Corporation Clinical Trial Management department

eigyou@kso.co.jp03-3452-7733

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026