This need not prove a hardship, for the wide
range, or variety, of fruits makes it possible to find one or more kinds
that will agree with each person.
23. As has been explained, sugar is the food material from which the
nutritive value of fruits is obtained. With the exception of a few
predigested foods, manufactured in such a way that they can be digested
easily, this sugar is probably the most easily digested form of food
that can be obtained. This substance, being held in solution in the
fruit juices, which are encased in a cellulose covering, depends to some
extent for its digestion on the hardness of the cellulose. When this
covering is old and hard or green and tough, as the case may be, it is
difficult for the digestive juices to break through and attack the sugar
contained inside. As this difficulty is not encountered when fruit is
fresh and ripe, its freshness and ripeness become important factors in
digestibility. Cooking is also an important factor because it softens
the cellulose, but there are certain other changes made by cooking that
must be taken into consideration as well.
24.
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