23 Oct 2020 --- Lallemand Health Solutions’ probiotic targeting mental health, Cerebiome, is tapping into the burgeoning gut-brain axis sector with its new post-hoc analysis. It found that the psychobiotic may significantly increase brain-derived neurotrophic factor (BDNF) serum levels in humans. Serum BDNF levels are lower in depressed patients and they increase after a long course of anti-depressant treatment.