The Feasibility of Overnight Time Restricted Eating and Impact on Glucose Levels in Shift Workers

Inclusion Criteria: * Healthcare professionals engaged in rotating shift work, including night shifts; * Aged 23-60 years; * At least 12 months experience in shift work; * Willing to wear continuous glucose monitor sensors; * Willing to engage in time restricted eating. Exclusion Criteria: * Diagnosis of diabetes (Type 1 or 2), any bariatric surgery, coeliac disease, inflammatory bowel disease, endocrine disorders affecting glucose metabolism, current or history of eating disorder, any liver, kidney, or coronary heart disease, obese (BMI\>35) or underweight (BMI\< 18) or any severe or unstable chronic medical conditions or cancers; * Currently taking medications known to interact with glucose metabolism, i.e. thyroxin, insulin sensitizers, glucocorticoids, or anti-depressants, weight loss medication; * Undertaking current structured or restrictive dietary plan; * Shift workers who routinely do not eat between 23:00 and 06:00 hours during night shift; * Current or planned pregnancy or currently breast feeding; * Consume three or more standard alcohol containing beverages on a single occasion almost every day; * People who identify as having significant caffeine dependency and are unwilling to limit intake of calorie free energy drinks; * People with planned travel over time zones during the study period * Any contraindication to use of Abott FreeStyle Libre Pro glucose sensor (eg prescription of vitamin C, Salicylic acid or paracetamol - to be reviewed by study clinician).