We're told losing weight is a matter of willpower, that semaglutide solves the problem, and that fruit fructose is the same as soda fructose. The reality is metabolic: endogenous GLP-1, insulin, leptin, microbiota, lean mass. Ten questions, a few traps, few mantras. Three levels: common myths, confusions that lead to the wrong tool, and the nuances magazine slimming tips ignore. Sources: NEJM, Cell Metab, Nature. See our terms and conditions. The information shared here does not replace advice from a qualified health professional.