Probiotic milk may shield athletes from Post-Race sniffles
NCT ID NCT06970964
First seen Jan 18, 2026 · Last updated Jun 23, 2026 · Updated 25 times
Summary
This study tested whether a daily probiotic drink (fermented milk with Lacticaseibacillus paracasei Shirota) could reduce cold-like symptoms in 80 amateur triathletes. Participants drank either the probiotic or a placebo for 30 days before a competition and 14 days after. Researchers tracked symptoms like sore throat and congestion, plus immune markers in saliva and blood. The goal is to see if probiotics offer a simple way to support immune health during intense physical stress.
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the original study
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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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Contacts and locations
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Locations
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Federal University of Sao Paulo
São Paulo, São Paulo, 04039-032, Brazil
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Fermented milk containing Lacticaseibacillus paracasei strain Shirota (a probiotic)
What this could lead to
If it works, this could offer a simple, non-drug way for athletes to reduce cold symptoms during intense training and competition.
What could go wrong
This is a small, completed study with 80 participants, so results may not apply to all athletes. Probiotics can cause mild digestive upset in some people.
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.