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Keywords: administration & dosage; Adolescent; Adult; Adults; Aged; Biological and medical sciences; Carbohydrates; Coffee; data collection; Diet; Diet Records; Dietary Carbohydrates; Dietary Carbohydrates - administration & dosage; Dietary Fats; Dietary Fats - administration & dosage; dietary surveys; Energy Intake; feeding frequency; Female; Food; Food intake; Human physiology applied to population studies and life conditions. Human ecophysiology; Humans; Male; Medical sciences; Men; Metabolic rate; Middle Aged; Norway; Nutrients; Nutrition; Nutrition monitoring; Nutritional survey. Food supply and nutritional requirement; Pilot Projects; Polls & surveys; quantitative analysis; Questionnaires; Reproducibility; Reproducibility of Results; Response rates; Reward; seasonal variation; Seasonal variations; Seasons; Surveys and Questionnaires; Women; Norway; Europe; Human; Energy consumption; Survey; Questionnaire; Diet; Surveillance; Food intake; Seasonal variation; Cohort study; Method; Food; Quantitative analysis