Effects of paraprobiotic Lactobacillus paracasei MCC1849 supplementation on symptoms of the common cold and mood states in healthy adults
2018
We investigated the effects of paraprobiotic Lactobacillus paracasei MCC1849 (LAC-Shield™) on symptoms of the common cold and mood states in healthy young adults. A total of 241 participants were randomised to receive 1×1010 heat-killed L. paracasei MCC1849 cell powder (10LP), 3×1010 heat-killed L. paracasei MCC1849 cell powder (30LP), or placebo powder without any L. paracasei cells once daily for 12 weeks based on the incidence of the common cold in the previous year, so that the risk of the incidence was equal among the groups. The incidence and severity of common cold symptoms were rated daily in a subject diary. Salivary secretory immunoglobulin A concentrations and saliva flow rates were analysed at 0 and 6 weeks. The Profile of Mood States (POMS) was assessed using POMS 2 0, 6, and 12 weeks after the intervention. No significant differences were observed in the incidence of the common cold among the groups. In a prespecified subgroup of subjects who had the common cold in the previous year, the inc...
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