Could a daily probiotic boost your immune defenses?
NCT ID NCT05632341
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested a probiotic supplement called GCWB1176 in 100 adults with normal or slightly low white blood cell counts. Participants took either the supplement or a placebo daily for 8 weeks. Researchers measured changes in natural killer (NK) cell activity and other immune markers to see if the supplement could improve immune function.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Lactococcus lactis (a probiotic supplement)
What this could lead to
If it works, this could point toward a simple daily supplement to help support the immune system, potentially reducing the frequency of common colds or infections.
What could go wrong
This is a small, early-stage trial with only 100 participants, and results may not apply to everyone. The supplement may show no significant benefit over placebo, and individual results can vary.
Disclaimer
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Seoul St. Mary's Hospital, College of Medicine
Seoul, South Korea
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St. Vincent's Hospital, College of Medicine
Suwon, South Korea