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Is a calorie from fat handled by the human body in the same way that a calorie from carbohydrate or protein is?

By: enfold
Date: Sun-Jan-3-2016-
Response
0
Amazingly, given enough calories, the human body is capable of manufacturing the majority of the thousands of the chemical nutrients that it needs to sustain life. Several nutrients, however, are not made by the body and are hence called essential. 

These essential nutrients are divided into six general categories: water, proteins, carbohydrates, fats, vitamins, and minerals. However, only three of these provide caloric energy: proteins, carbohydrates, and fats. 

All three provide energy (measured in calories), but the amount of energy in 1 gram (1/28 ounce) differs: 4 calories in a gram of carbohydrate or protein and 9 calories in a gram of fat. These nutrients also differ in how quickly they supply energy. Carbohydrates are the quickest, and fats are the slowest. Carbohydrates, proteins, and fats are digested in the intestine, where they are broken down into their basic units: carbohydrates into sugars, proteins into amino acids, and fats into fatty acids and glycerol. 

Here are some good links:
[1] http://www.merck.com/mmhe/sec12/ch152/ch152b.html
[2] http://www.mckinley.illinois.edu/handouts/macronutrients.htm
[3] http://www.editorsweb.org/nutrition/essential-nutrients.htm
[d] By: swooned
Date: Sun-Jan-3-2016
Response
0
They also say that we them for different purposes:
We need carbohydrates because:
* Carbohydrates are needed for the central nervous system, the kidneys, the brain, the muscles (including the heart) to function properly..
* Carbohydrates are important in intestinal health and waste elimination.

Proteins make up the structural foundation of the cells, tissues, and organs. Proteins are made up of smaller building blocks called amino acids. 
We need protein for:
* Growth 
* Tissue repair
* Immune function
* Making essential hormones and enzymes
* Energy when carbohydrate is not available

Fats are complex molecules composed of fatty acids and glycerol. The body needs fats for growth and energy. It also uses them to synthesize hormones and other substances needed for the body's activities (such as prostaglandins). Fats are the slowest source of energy but the most energy-efficient form of food. Although fats have received a bad reputation for causing weight gain, some fat is essential for survival we need fat for:
* Normal growth and development
* Absorbing certain vitamins ( like vitamins A, D, E, K, and carotenoids)
* Providing cushioning for the organs
* Maintaining cell membranes
[d] By: motorist
Date: Sun-Jan-3-2016
Response
What is 1 + 100



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