Irritable bowel syndrome (IBS) involves a complex process influenced by factors such as issues with gut movement, changes in the serotonin reuptake gene (SERT), gut microbiota alterations, stress responses, interaction between the brain and the digestive tract [6], heightened sensitivity to visceral stimuli, and the presence of low-grade inflammation [7]. The gene discussed is SLC6A4; the disease is irritable bowel syndrome.