Characterization and Management of Metabolic Dysfunction-Associated Fatty Liver Disease (MAFLD)

The goal of this clinical trial is to improve the treatment of hepatic steatosis associated with obesity with pharmacological and nutritionnal approaches. The main question it aims to answer is: Does an individualized nutritionnal approach with a dietician combined with medication targeting obesity is the most efficient way to treat hepatic steatosis associated with obesity? Participants will either participate in one of three groups: * Nutrition: Participant will only have a regular follow-up with a registered dietician; * Nutrition + Semaglutide: Participants will start a new medication targeting obesity and will have a regular follow-up with a registered dietician; * Semaglutide: Participants will start a new medication targeting obesity.

Participants in each group will be followed during a year for 4 timepoints (0, 3, 6 and 12 months). Blood and feces samples, anthropometric measures, transient elastography measurements and health questionnaires will be assessed at each timepoint. The nutritionnal intervention targeting hepatic steastosis associated with obesity will use conclusions from a systematic review we conducted on nutritionnal approaches to treat liver steatosis.