From: dinska ( -18.104.22.168)
Subject: Re: Why stuff in so many calories?!
Date: February 8, 2014 at 2:07 am PST
In Reply to: Why stuff in so many calories?! posted by Paul on January 31, 2014 at 1:57 pm:
I think this is a bit mixed up, you don't have to eat more calories, but
if you are eating high carb you have to eat more volume. From wikipedia:
Fats and ethanol have the greatest amount of food energy per
mass, 37 and 29 kJ/g (8.8 and 6.9 kcal/g), respectively. Proteins and
most carbohydrates have about 17 kJ/g (4.1 kcal/g). The differing energy
density of foods (fat, alcohols, carbohydrates and proteins) lies mainly
in their varying proportions of carbon, hydrogen, and oxygen atoms.
Carbohydrates that are not easily absorbed, such as fiber, or lactose in
lactose-intolerant individuals, contribute less food energy. Polyols
(including sugar alcohols) and organic acids contribute 10 kJ/g (2.4
kcal/g) and 13 kJ/g (3.1 kcal/g) respectively. The amount of water,
fat, and fiber in foods determines their energy density.
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