Participants
CHRONIC DISEASES, CHRONIC DISEASE
The study was conducted at the National Food Institute (NFI), Technical University of Denmark. One hundred and twenty volunteers aged 18–60 years were recruited through advertisement in the university newspaper, on the university’s local network (students and employees), and newsletter, in local newspapers and through Facebook. Interested participants conducted an on-line preliminary screening about age, Danish language, Internet access, weight stability and chronic diseases and signed up for the study through a website. Participants were chosen to get an equal distribution of men and women in the age groups 18–30, 31–45 and 46–60 years to capture the different life stages in the adult population. All participants underwent an in-depth telephone screening interview. Inclusion criteria were Danish speakers, access to the Internet, acceptance of the participant tasks involved, basic good health (no chronic disease requiring medicine), weight stable and not actively trying to lose weight or taking medications known to affect food and EI, appetite or water balance. Pregnant and lactating females and nutrition professionals were also excluded.Participants were informed about the study through information meetings, during the screening interviews and written information was sent twice to all participants. Everyone entering the study provided written informed consent. This study was conducted according to the guidelines laid down in the Declaration of Helsinki, and all procedures involving human subjects were approved by the Regional Ethical Committee of Copenhagen and by the Danish Data Protection Agency (no 17006825).