PEEK INSIDE: IPAWC + PROBIOTA 2018, BARCELONA 7-9 FEBRUARY Depression: A new role for probiotics in nutritional psychiatry? 15-Jan-2018 By Tim Cutcliffe The possibility that probiotics could be a new tool in fighting depression is gaining increasing attention in nutritional psychiatry, says Caroline Wallace ahead of her talk at the IPA World Congress + Probiota 2018 next month.