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Background  Climate change is an urgent global issue and the food sector is a major contributor to greenhouse gas emissions (GHGE). Here we study if a diet low in GHGE could be a nutritious diet compared to the Nordic Nutrition Recommendations (NNR).    Methods  The environmental impact of foods from Life Cycle Assessment (LCA) data was linked to a food frequency questionnaire (FFQ) filled out by 5,364 participants in the Swedish LifeGene study. Thereafter, we calculated the daily emission of CO 2  equivalents (CO 2 e) as well as the intake of selected nutrients associated with vegetables, fruits, meat and dairy products. The CO 2 e was divided into quartiles were quartile 1 corresponds to a diet generating the lowest CO 2 e, and quartile 4 corresponds to a diet with the highest CO 2 e.    Results  The overall diet-related emission was 4.7 kg CO 2 e/day and person, corresponding to 1.7 ton CO 2 e/year. In general, there were only small differences in nutrient intake between groups of varying levels of CO 2 e, regardless if the intake was analyzed as absolute intake, energy percent or as nutrient density. Moreover, adherence to NNR was high for the group with the lowest CO 2 e, except for saturated fat where the intake was higher than recommended for all CO 2 e groups. On the other hand, only the group with the lowest CO 2 e fulfilled recommended intake of fiber. However, none of the CO 2 e groups reached the recommended intake of folate and vitamin D.    Conclusions  Here we show that a self-selected diet low in CO 2 e provides comparable intake of nutrients as a diet high in in CO 2 e.    Electronic supplementary material  The online version of this article (doi:10.1186/s13690-017-0185-9) contains supplementary material, which is available to authorized users.

Is a diet low in greenhouse gas emissions a nutritious diet? – Analyses of self-selected diets in the LifeGene study