If you've ever been told to take a probiotic — after a course of antibiotics, or just for your general health — you may be wondering what they actually do. 

Well, Norman and Tegan are here to dig into the research about these over-the-counter supplements, which claim to support digestion, boost immunity and even improve mood. 

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References:

• Probiotics for the prevention of paediatric antibiotic-associated diarrhoea 
• Multispecies Probiotic for the Prevention of Antibiotic-Associated Diarrhoea in Children
• A systematic review of gut microbiota composition in observational studies of major depressive disorder, bipolar disorder and schizophrenia 
• Post-Antibiotic Gut Mucosal Microbiome Reconstitution Is Impaired by Probiotics and Improved by Autologous FMT