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In nutrition and food science, the term calorie and the symbol cal may refer to the large unit or to the small unit in different regions of the world. It is generally used in publications and package labels to express the energy value of foods in per serving or per weight, recommended dietary caloric intake, [6] [7] metabolic rates, etc.
The equation that is recommended to estimate BMR by the US Academy of Nutrition and Dietetics is the Mifflin-St. Jeor equation. [ 3 ] The equations for estimating BMR in kJ/day (kilojoules per day) from body mass (kg) are: [ 4 ]
For example, following analysis of oxygen consumption of a human subject, if 5.5 kilocalories of energy were estimated during a 5-minute measurement from a rested individual, then the resting metabolic rate equals = 1.1 kcal/min rate.
KCAL-FM, a radio station (96.7 FM) licensed to Redlands, California, United States; KCAL-TV, a television station (channel 9) licensed to Los Angeles, California, United States; kcal, kilocalorie (1,000 calories), a unit of energy (sometimes referred to as 1 Calorie, with a capital C, as opposed to a small c).
The Estimated Energy Requirement, , is the estimated number of daily kilocalories, or Calories, an individual requires in order to maintain his or her current weight.For a person with a body mass of (kg), height of (m), age of (years) and Physical Activity , this is given by
To facilitate evaluation by consumers, food energy values (and other nutritional properties) in package labels or tables are often quoted for convenient amounts of the food, rather than per gram or kilogram; such as in "calories per serving" or "kcal per 100 g", or "kJ per package". The units vary depending on country:
Because adipose tissue does not use much energy to maintain, fat free mass is a better predictor of metabolic rate. A taller person will typically have less fat mass than a shorter person at the same weight and therefore burn more energy.
Women need, on average, 1800–2200 kilocalories (kcal) a day whereas children need 1500–2000 kcal and men 2200–2700 kcal. [2] In March 2009, the European Food Safety Authority published its opinion on intake levels for Europe and they were consistent with numbers behind the GDAs developed in the UK.