Core Argument - The gut microbiome, consisting of trillions of microorganisms, significantly influences human feelings, decisions, memory, immunity, and cravings [1][2][3][4] - The gut and brain are connected via a highly active communication pathway, impacting decision-making processes [4][5] Research & Experimentation - A research study is being conducted with patients undergoing digestive tract surgery, using kombucha as a probiotic and a placebo to study the impact on the microbiome [8][9] - Placebo effects are crucial in microbiome research to differentiate the impact of probiotics from the psychological effects of treatment [10][11][12] - Studies show that altering the microbiome with probiotics can influence risk-taking behavior, patience, and reactions to unfairness [13][14][15][16][17][18][19][31] Microbiome & Lifestyle - Urban living can reduce the diversity of the gut microbiome by approximately fourfold compared to living closer to nature [33] - A diet beneficial for the microbiome includes natural, unprocessed foods, vegetables (ideally not perfectly cleaned), and fermented foods like kimchi and kombucha [35] - Alcohol consumption, even in small amounts, can harm the gut microbiome [35][36]