The Impact of Glycemic Index on Sleep and Memory Consolidation

Inclusion Criteria: * Male (given that the menstrual cycle may influence sleep polysomnography) * Good health * Not taking any medication known to effect sleep or metabolism * Normal sleep duration (i.e. between 6.5 - 9 hours of sleep per night) * A sleep efficiency score above 80% (Pittsburg Sleep Quality Index) * Normal sleep schedule (i.e. fall asleep between 10pm and 12pm) * No difficulty sleeping in new places Exclusion Criteria: * Diagnosis of any physical or mental disorder e.g. diabetes, cardiovascular disorders, gastrointestinal disorders, sleep problems, epilepsy, or mood disorders * Unhealthy weight (BMI over 30) * Drink more than 300mg of caffeine per day (3 - 4 standard sized 8-oz cups) * Work nights or shifts * Smoke/vape * Regularly drink alcohol (\>3 glasses per day) * Used recreational drugs within the last 6 months * Take part in \>3 hours of vigorous exercise per week * Any known food allergies or intolerances * Nocturnal eating or regular consumption of alcohol before bed (assessed by the Meal Pattern Questionnaire)