In 2016, the Nordic Council of Ministers took the initiative to update the scientific foundation for national nutrient recommendations and dietary guidelines in the Nordic and Baltic countries. The present NNR2023 report has been developed according to the project description and describes the science advice to the authorities in the Nordic and Baltic counties. The scientific foundation for the NNR2023 report consists of approximately 100 qualified systematic reviews, including 9 de novo qualified systematic reviews, and 57 de novo background reviews on nutrients, food groups, mealand dietary patterns, physical activity, body weight, food and nutrient intakes, and burden of diseases in Nordic and Baltic countries. In addition, several de novo papers on principles, methodology and environmental impact of food consumption are also essential parts of the scientific foundation of NNR2023 report. Many scientists have contributed to the NNR2023 project as authors of these background papers, served as referees or participated in reference groups. All papers will be available at the website of the Nordic Council of Ministers, and as part of the extended NNR2023 report. While the NNR2023 Committee highly appreciates and acknowledges the considerable and essential contributions and suggestions by these scientists, the present NNR2023 report is the sole responsibility of the NNR Committee.