My prime interest is the relation between nutrition and long-term outcomes in the general population and in specific patient populations, particularly patients with chronic kidney disease and patients with diabetes. A strong characteristic of my research in this field is that I make use of objective assessments of biomarkers of nutritional intake and nutritional status in addition to subjective assessments of intake from questionnaires. To allow for performing this research I have been involved in building large cohorts with underlying biobanks and longitudinal follow-up in the general populations and in the mentioned patient groups. Results of my research have been published in more than 850 manuscripts in high-ranking, international, peer-reviewed journals on which I was co-author, and in 47 succesfully defenced PhD-theses which I supervised.