In recent years, several researches have increasingly highlighted the crucial relationship between gut health and mental well-being. The gut, often referred to as the "second brain", plays a crucial role in influencing emotions, mood, and even cognition despite having the prime control on digestion. This phenomenon, known as the gut-brain connection, underscores the profound impact that our digestive system can have on our mental health. Key Concepts and Mechanisms There are several key concepts to the understanding of the gut brain connection. They are as below: 1. Microbiota: The gut harbors a diverse ecosystem of microorganisms, collectively known as the gut microbiota. These bacteria, fungi, and other microbes play a pivotal role in maintaining gut health and influencing brain function. They produce neurotransmitters like serotonin, dopamine, and gamma-aminobutyric acid (GABA), which are crucial for mood regulation and stress response. 2. Neurotransmitters: Seroton...