vl[amlr
countr3
VitamiJ
not eno
Or2
VITAMINS
lin A is one of the easiest vitamins t
ounded diet， for it is not lost to any
ing or storing. Yet， borderline deficie
is thought by nutritionists to be com~
What this means is that most people
A to protect them from serious conse
tgh to keep them in the peak of health.
plants and animals are sources for Vita
ing the better s0urc~ for us because t
ete vitamin， whereas~.in nlants we eat
en converted to
td not be overk
vitamin A xs stored in the body (mainly in the liver)
which allows a considerable depletion before symptoms ol
deficiency occur. Mobilization of Vitamin A from the liver
depends on adequate dietary protein. Inadequate Vitami~
A and protein frequently occur together and are
ered as the two most common causes of malnutrition. Peo-
I Fs~ ~o ltamm A/n. i~fffS~ d~ch iFd~i~ *ai ~-Tfih-dh~rh--d~e
su-u ~ptl~ to the e-- ~s~Tta- -m~-A~qSecause
th~me--ffT6-b-fi~ a reserv&-T15~-firs~-6b~ibus
s~t~q~ss. This is chie~ an inability to
adapt to bright lights or to darkness. If you can t see for a
while when\"yoff come into a bright room from darkness， or
can t make out anything at night after being exposed to a
sudden glare， such as headlights， you probably have Vita-
min A deficiency. If you are only comfortable when wear-
ing_sunglasses on bright days， or you squint excessively，
you d better have an examination for Vitamin A deficiency.
|
内容加载中，请稍后...
商品评论（0条）