Thursday, March 18, 2010

Calories Count

Durian
Foods provide our bodies with energy. We use this energy for physical activity as well as for basic functions like respiration, digestion, circulation, and temperature regulation. The energy used for these involuntary bodily functions is known as resting energy expenditure.

Energy from food is measured in kilocalories, or the amount of energy or heat required to raise the temperature of 1 kilogram of water by 1 degree Celsius. The term calories is often substituted for kilocalorie.

Calories affect body weight directly. If we consume more calories than we burn, our bodies will convert the extra calories (energy) to fat, and will store it throughout the body. If we burn more calories than we consume, our bodies will draw on stored energy, or fat, to perform the basic functions and to fuel physical activities.

Calories come from four sources-carbohydrates, protein, fat, and alcohol. The majority of calories should come from carbohydrates, protein, and fat. (Alcohol does not provide any nutrients and is therefore considered non-nutritive). Generally experts recommend that most people get 55 to 60 percent of their total calories from carbohydrates, 12 to 15 percent from protein, and no more than 30 percent from fat.

Not all sources of calories are equal. Fat supplies more than two times the calories per gram that carbohydrates and protein do, so fats and foods that are high in fat are said to be calorie dense. But these foods may also be dense in nutrients. Alcohol also supplies significantly more calories per gram than carbohydrates and protein, but it contains no nutrients whatsoever.

Carbohydrates 4 calories per gram Protein 4 calories per gram Fat 9 calories per gram

Alcohol 7 calories per gram

(There are 28 grams in an ounce) Techniques of healthy cooking -- The Culinary Institute of America.




1 comment:

  1. our cellular functions are amazing and smartly discriminating. thanks keppi for the info! proves that alcohol is not part of the recommended food groups (shucks) :) oh well, you live and you learn with the help from relative evidence- based research.

    ReplyDelete