The Metabolic and Circadian Effects of Shift Work

Inclusion Criteria: * Men and women * Age 20-50 years * Working ≥ 80% full-time equivalent over the previous month and during the study * Working night shifts (i.e. shifts that comprise working hours between 23h and 06h) in rotation with day shifts (i.e. shifts that comprise working hours between 06h and 20h) * Planned to work at least 3 consecutive night shifts during the study preceded by at least a day off or day shift * Planned to work at least 3 consecutive day shifts during the study * Confident use of a smartphone compatible with the study application (iOS, Android) and able to regularly take pictures of consumed food/drinks * Able to give a fully informed consent and follow the study procedures Exclusion Criteria: * Planned or current pregnancy during the study * Menopausal women * Major illness or hospitalization over the previous month * Carries a pacemaker, pump or other medical device that can be disabled by a magnet * Major mental illness * Trip to a different time zone (≥ 2-hour time difference) over the previous month or planned during the study * Enrolled in an interventional clinical trial (potentially interfering with the main outcomes) over the previous month or planned during the study