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Old 04-27-2012, 07:03 AM   #243
Broxi
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Join Date: Oct 2007
Location: Scotland, UK
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Default Re: Nutrition for boxing

I was just looking for some info on number of calories contained in a gram of protein, carb, fats, etc and came across this ... thought I'd post it here for others info or feedback.

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Protein provides 3.2 calories per gram, not 4 calories per gram


Posted by Larry Hobbs
Saturday, February 24, 2007 1:34 am Email this article


How long have you heard that protein and carbohydrates provide 4 calories per gram of food, and fat provides 9 calories per gram? Probably forever. But these numbers are bogus according to a recent paper by Dr. Geoffrey Livesey.

Proper calculation
Calculate calores after subtracting the calories required for metabolism and storage

The calorie content of food should represent the amount of calories left for your body to use after subtracting the calories required for metabolism and storage.

It is called Net Metabolisable Energy.


Protein
Protein : 3.2 calories per gram

After subtracting the calories required for metabolism and storage, protein contains 3.2 calories per gram, not 4 calories as we have always been told.


Fat
Fat : 8.7 calories per gram

After subtracting the calories required for metabolism and storage, fat contains 8.7 calories per gram, not 9 calories as we have always been told.


Carbohydrates
Carbohydrates : 3.8 calories per gram

After subtracting the calories required for metabolism and storage, carbohydrates contains 3.8 calories per gram, which is what we have always been told.


Alcohol
Alcohol : 6.3 calories per gram

After subtracting the calories required for metabolism and storage, alcohol contains 6.3 calories per gram, not 7 calories as we have always been told.


Fiber
Fermentable fiber : 1.9 calories per gram

After subtracting the calories required for metabolism and storage, fermentable fiber contains 1.9 calories per gram, not 0 calories as we have always been told.

List of fermentable fibers

A list of some soluble (fermentable) fibers include:

Psyllium
guar gum
cellulose
oat bran
barley
inulin
xanthan gum
fructooligosaccharides (FOS)
resistant starch
sugar alcohols

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