1. World Health Organization, 2017. Depression and Other Common Mental Disorders: Global Health Estimates.
2. Cryan, J.F. et al, 2012. Mind-altering microorganisms: the impact of the gut microbiota on brain and behaviour. Nature reviews. Neuroscience 13, 701-712.
3. Smith, C.J. et al. 2014. Probiotics normalize the gutbrain-microbiota axis in immunodeficient mice. American journal of physiology. Gastrointestinal and liver physiology 307, G793-802.
4. Pinto-Sanchez, M. et al. 2017. Probiotic Bifidobacterium longum NCC3001 Reduces Depression Scores and Alters Brain Activity: A Pilot Study in Patients With Irritable Bowel Syndrome. Gastroenterology /
5. Tillisch, K. et al. 2013. Consumption of fermented milk product with probiotic modulates brain activity. Gastroenterology 144, 1394-1401, 1401 e1391-1394.
6. NG C.Q. et al. 2018 .A meta-analysis of the use of probiotics to alleviate depressive symptoms. J Affect Disord. 1;228:13-19.
7. Steenbergen, et al. 2015. A randomized controlled trial to test the effect of multispecies probiotics on cognitive reactivity to sad mood. Brain, behavior, and immunity 48, 258-264
8. Huang, R. et al. 2016. Effect of probiotics on depression: a systematic review and meta-analysis of randomized controlled trials. Nutrients 8 (8), 483.
9. Bolla, et al. 2011. Effect of freezedrying on viability and in vitro probiotic properties of a mixture of lactic acid bacteria and yeasts isolated from kefir. J. Dairy Res. 78 (1), 15–22.