Giovanni Vozzi, PhD, University of Pisa, Pisa, Italy, comments on the relationship between the gut microbiota and the body. An in vitro model consisting of patient samples can observe changes in the microbiota from the stomach to the rectum, as well as changes in the metabolites produced and how it affects different tissues. Knowledge of the microbiota can subsequently optimize treatment strategies and the diets of patients to improve outcomes. This interview took place at the 6th World Congress of the Tissue Engineering and Regenerative Medicine International Society (TERMIS 2021).