A meta-analysis evaluating the efficacy of probiotics/prebiotics among people with cognitive impairment was published in PLoS One. A plausible link occurring via the microbiota-gut-brain axis raises the possibility of benefit with supplementation, and this meta-analysis included 10 randomized and controlled clinical trials to discern the strength of this connection. Combined, this was a total of nearly 800 participants, though all of the included studies were rather small. For example, the la...
