Live bacteria used to treat URTIs

A randomised controlled trial of males aged 30-49 years were given L. casei in a solution of fermented milk for 12 weeks over the winter period. They had a decreased risk of upper respiratory tract infections (URTIs) and were found to be affected for a shorter duration when they had an episode.

Shida K, Sato T, Iizuka R, Hoshi R, Watanabe O, Igarashi T, Miyazaki K, Nanno M, Ishikawa F. Daily intake of fermented milk with Lactobacillus casei strain Shirota reduces the incidence and duration of upper respiratory tract infections in healthy middle-aged office workers. Eur J Nutr. 2017 Feb;56(1):45-53. doi: 10.1007/s00394-015-1056-1. Epub 2015 Sep 29. PMID: 26419583; PMCID: PMC5290054

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