Handbk of Nutrition 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024

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