 The prevalence of non-alcoholic fatty liver disease, NAFLD, has been on the rise due to the global increase in obesity and insulin resistance. While liver fat plays a major role in metabolism, its exact impact on the development of type 2 diabetes and cardiovascular disease remains unclear. Dietary interventions may reduce liver fat levels, but the magnitude of these reductions and the optimal timing and dosage remain unknown. Additionally, there is no consensus regarding the best method for measuring liver fat content or the most accurate way to assess the effects of dietary intervention on liver fat. To address these issues, a workshop was held to bring together experts in the field to discuss the current state of knowledge and identify areas where further research is needed. This article was authored by Harry P. F. Peters, Patrick Shorwin, Petra Verhoef, and others.