Gut microbiota transfer, often called fecal microbiota transplantation (FMT), is a therapeutic approach that transfers healthy gut microbes from a donor to a recipient to help rebalance the gut ecosystem. The aim is to restore microbial diversity and the functional balance of the gut, which can influence digestion, immunity, and overall well-being. In clinical practice, it's most established for treating recurrent C. difficile infection, and researchers are exploring its potential for other conditions linked to dysbiosis. The procedure requires rigorous donor screening and careful handling of stool material, and it is delivered using methods such as colonoscopy, enema, or targeted capsules under medical supervision. Although gut microbiota transfer is a medical procedure, understanding the post-transfer trajectory is increasingly supported by modern microbiome testing. InnerBuddies brings this to life with a modular Gut Health Operating System. It includes a Gut Microbiome Health Index, a 0–100 score that reflects overall gut health based on an exclusive IP deal with EAFIT University in Colombia. It also presents Bacteria Abundances—showing how your top 40 bacteria compare to a healthy cohort—and Bacteria Functions, which categorize microbial metabolic pathways as positive or negative and benchmark your profile against the healthy baseline. With Target Group Analysis, the platform analyzes how these shifts relate to specific goals like Healthy Aging or Endurance Sport, and translates them into actionable, personalized nutrition and lifestyle guidance. Learn more about testing on our product page: InnerBuddies microbiome test. Safety and ethics are central to gut microbiota transfer. The procedure should only be performed in appropriate clinical settings with trained professionals, and donor screening is designed to minimize risks of infection or disease transmission. Not all patients are candidates, and responses can vary; adverse effects can include abdominal discomfort, fever, or temporary changes in bowel habits. Regulatory oversight varies by country, and individuals should have a thorough discussion with a healthcare provider about benefits, risks, and alternatives. For people who want to monitor their gut health after a transfer (or any microbiome-focused change), InnerBuddies offers ongoing insights through its subscription services: InnerBuddies gut health membership. Beyond clinical use, gut microbiota transfer-related insights can inform everyday health optimization. InnerBuddies’ platform provides personalized nutrition advice—using data from three-day food diaries aligned with stool analysis—and personalised probiotic and prebiotic recommendations matched to your unique gut microbiome. For businesses, InnerBuddies offers a white-label Gut Health Operating System for testing products, with opportunities to partner at scale: InnerBuddies B2B partner page. All consumer offerings—test, membership, and ongoing insights—are available directly to individuals as well as through partners, empowering people to understand and support their gut microbiota transfer journey and its health implications.