PROMISS (PRevention Of Malnutrition In Senior Subjects in the EU) is a multi-country project aiming to turn the challenge of tackling malnutrition in community-dwelling older persons into a opportunity for healthy ageing for the future. The PROMISS consortium contains worldwide expertise in epidemiology, clinical trials, geriatrics, nutrition, physical activity, microbiomics, as well as in behaviour, consumer, sensory and computer sciences. It builds on strong collaborations with food industry and SMEs to strengthen innovation of the European agri-food sector and their market position. Existing data from scientifically well-established prospective aging cohorts and national nutritional surveys from Europe and 'third countries' will be combined with new data from short- and long-term intervention studies in older persons at risk.