The 1st EAU Masterclass on Metabolics in Stone Disease took place on February 26–27, 2026, at Tenon Hospital in Paris, offering 50 participants an in-depth update on advances in genetics, patho­physiology, diagnosis, prevention, and metabolic management of stone disease. In this expert setting, our innova­tive Hydrogel Method mediNiK® was presented and generated strong interest among attendees.