Basal metabolic rate is the energy expended by an individual at rest (when fasted and at thermoneutral temperature), as a result of normal cell and organ function within the body, and accounts for approximately 60–75% of total daily energy expenditure in individuals with a sedentary occupation.

A small calorie (cal) is the amount of energy required to raise the temperature of 1 gram (g) of water by 1º Celsius (º C).

What are carbohydrates? Carbohydrates, or carbs, are sugar molecules. Along with proteins and fats, carbohydrates are one of three main nutrients found in foods and drinks. Your body breaks down carbohydrates into glucose. Glucose, or blood sugar, is the main source of energy for your body's cells, tissues, and organs.