This article is from the Fat-free Diet FAQ, by artemis@rahul.net (Michelle Dick) with numerous contributions by others.
It is absolutely true that we need fat in our diet to function
properly. It would be unhealthy to eliminate all fat. However, in
a non-junk-food diet composed of a variety of foods it is
impossible to eliminate all fat. All foods have fat. A diet
consisting only of beans, fruits, vegetables, and grains (and
*zero* added oils or high-fat ingredients) will naturally obtain
about 6-10%CFF. Since few people are this strict 100% of the time,
most of those who attempt vlf diets get 10-20%CFF.
We get people on the group from time to time who claim to eat no
fat or extremely little (say less than 10 grams per day). Unless
one is eating mostly fatfree junk food or extremely few calories
(less than 1200 cal/day) this is highly unlikely. Keep in mind
foods labeled "fat free" can contain up to 0.5 grams of fat per
serving and that all foods (fruits, vegetables, beans, grains, etc)
contain some fat, even skim milk!
 
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