Calories in Pork
Calorie is a unit of measurement for energy.
One calorie is formally defined as the amount of energy required to raise one cubic centimeter of water by one degree centigrade. We use kcal (1,000 calories) to measure the amount of energy in food.
Nutrition Facts for 100g
Daily values based in a diet 2,000 kcal
An average adult needs 2,000 calories per day to maintain bodily functions, so you may have the 45% of your total daily needs from 100 grams of Pork (898 calories / 100 grams).
The Basal Metabolic Rate is the amount of energy you need while resting in a temperature environment when your digestive system is inactive. In such a state, your energy will be used to maintain your vital organs. The BMR decreases with age and increases with muscle mass.