Re: calories we consume


I have a question. It may be silly, but i don't know.

If I eat or drink something that is 100 calories, does my body absorb
all 100 calories?

It is not a silly question.

A calorie is the measure of the energy content in a food. However not
all
of each food we eat has its energy available for us to use. Some parts
of
food can not be digested in the small gut and pass into the large gut.
There billions of bacteria use it for their energy source and some of it
is
converted into energy sources we can use. In the process some energy is
lost to make the conversion possible.

Even then not all is used even by that method and what is left of a food
is
passed from the gut. You might have examined the excrement of a horse.
Often there are for example whole grains that passed through the animal
because digestion and the bacteria could not convert it because of the
external hard shell of grains. In humans if we eat the stem of a fruit
or
its seeds this is also likely to be the case. They contain energy
measured
in calories but can not be converted.


In general the more a food is broken into smaller pieces by grinding and
chewing etc. and or broken down by heat in cooking more of the energy
will be available. Still the bran of grains and other such structural
parts of foods are handled as discussed above and the bacteria can
convert some but not all parts.

The specific answer to your question is that it depends on which food
and how treated in preperation to eat.
.

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