Impact of consuming a milk drink containing a probiotic on mood and cognition.
CONCLUSIONS:
The consumption of a probiotic-containing yoghurt improved the mood of those whose mood was initially poor. This improvement in mood was not, however, associated with an increased frequency of defaecation.
Eur J Clin Nutr. 2007 Mar;61(3):355-61. Epub 2006 Dec 6.