Figure 1.

Psychobiotics in nutrition improve gut and brain health via the microbiome–gut–brain axis (Figure is drawn by authors Dahiya and Nigam). The consumption of probiotic products act as psychobiotics, where the microbiota-driven gut–brain axis reflects an interaction between the central nervous system and the intestine through the vagus nerve. Detailed information is available in references [1,2,3,4] for the boxes Probiotic food, Probiotic beverages, and Probiotic supplements. References [80,81,82,83,84,85,86,87,88,89] provide detailed information for the boxes Gut health, Inflammatory gastrointestinal disorders, Vagus nerve, Gut–brain axis, and Psychiatric disorders.