Validity and Reproducibility of Dietary Assessment Against Objective Measures

A cross-sectional study with repeated measurements among healthy Danish adults to assess the validity and reproducibility of a self-administered 7-day web-based dietary assessment tool, myfood24® tested against objective biomarkers.

Inclusion criteria:Apparently healthy adults between 35 and 70 years oldBody mass index (BMI) between 22-32 kg/m2Weight stable defined as gain or loss of < 2.5% body weight during the past 3 months;Willingness to maintain current dietary and physical activity habits throughout the study period.Have high-speed internet access;Able to speak, read and write Danish;Willing to visit the Department of Nutrition, Exercise, and Sports (NEXS).Exclusion Criteria:Clinically diagnosed chronic disease,use of corticosteroids or other medication that would potentially affect the nutrient metabolism or excretion of biomarkers of interest,presence of food allergy or intolerance that requires a special diet,pregnancy and lactation,excess physical activity (>5h/week of high intensity),current participation in another trial