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When daily food intake is matched to energy needs, people are said to be in an energy balance, which allows them to maintain a stable body weight. When energy intake is higher than needed to support the total daily energy requirements it can lead to an increase in body weight. Similarly, if you eat less than you need to support daily energy requirements, you lose weight, as your body will fuel itself through your internal stores. The amount of daily energy varies greatly across populations and can be impacted by age, sex, pregnancy, muscle mass, hormone function, medications, and genetic factors. The total number of calories that a person expends in a day is called the Total Daily Energy Expenditure (TDEE). The calories that are burned throughout the day are used for exercise, maintaining your metabolism, digestion and absorption of food, and general activities. The combination of BMR, TEF, EA, and NEAT combine to form TDEE. Let's break this down: -Basal Metabolic Rate (BMR) is th...