Psychobiotics are a type of probiotic that has been shown to improve people's mental health. Their ability to produce or encourage the creation of neurotransmitters, short-chain fatty acids, enteroendocrine hormones, and anti-inflammatory cytokines sets them apart from traditional probiotics. Psychobiotics have a wide range of applications due to this potential, ranging from mood and stress relief to being used as an adjuvant in the treatment of various neurodevelopment and neurodegenerative disorders. Psychobiotics is a word used in preliminary research to refer to live bacteria that, when taken in proper numbers, may have a positive effect on the host organism's microbiome, potentially improving mental health. The processes by which microorganisms exert their psychobiotic potential are still to be fully understood. However, it has been discovered that these bacteria benefit mostly through the hypothalamic-pituitary-adrenal (HPA) axis, immunological response and inflammation, and neurohormone and neurotransmitter synthesis.