It is surprising what an enormous fuel value certain foods have which

are eaten very carelessly, and what a very low fuel value others have
which are quite satisfying to hunger
It is surprising what an enormous fuel value certain foods have which
are eaten very carelessly, and what a very low fuel value others have
which are quite satisfying to hunger. For example: One would have to eat
$9.00 worth of lettuce and tomato salad to furnish 2,500 calories, the
amount of fuel for the day"s requirements (Lusk), while about 30 cents"
worth of butter, or 10 cents" worth of sugar would furnish the same
amount of energy. No one would think of feeding exclusively on any one
of these foods, but it is easy to see how the elimination of butter and
sugar and the introduction of such foods as lettuce, tomatoes, celery,
carrots, spinach and fruits, all of which have a low fuel value, would
enormously reduce the available energy and therefore the fat-forming
elements in the diet, yet fill the stomach and satisfy the
hunger-craving. Hunger is largely dependent upon the contractions of the
empty stomach and not upon a general bodily craving for food.