That
taken by women is usually computed to be about four-fifths of the amount
necessary for a man. The proportion of food substances does not differ,
however, and when individual peculiarities are taken into consideration,
no definite rules can be made concerning it.
In the case of boys and girls up to the age of young manhood and
womanhood, the same amount of food is required, except for the
difference in activity, boys usually being more active than girls.
42. EFFECT OF CLIMATE ON DIET.--The climate in which a person lives has
much to do with the kind of diet he requires. In the extreme North, the
lack of vegetation makes it necessary for the inhabitants to live almost
entirely upon animal food except during the very short warm season.
Consequently, their diet consists largely of protein and fat. Under some
circumstances, a diet of this kind would be very unfavorable, but it
seems to be correct for the people who live in these regions, for
generations of them have accustomed themselves to it and they have
suffered no hardship by doing so. It is true, however, that races of
people who do not live on a well-balanced diet are not physically such
fine specimens as the majority of persons found in countries where it is
possible to obtain a diet that includes a sufficient supply of all the
food substances.
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