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Each year an estimated two hundred fifty thousand to half a million children go blind from vitamin A deficiency.
VOA: special.2011.03.01
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It means that we supplement our diets with all sorts of things to fix perceived deficits in this mineral, in this vitamin, in this thing that somebody tells us is good for us.
也就是说,我们只要听说哪些是有益的,就用各种各样的东西来进补,这种矿物质,那种维生素,诸如此类
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How much Vitamin A should they have?
他们应该摄入多少维生素A
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Several years later, researchers discovered the exact cause of pellagra: a lack of the B vitamin known as niacin.
VOA: special.2009.01.27
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Now the fact that people were so reliant on certain foods led to deficiencies of certain nutrients, so people that were dependent on a rice based diet tended to have problems with deficiencies in protein, Vitamin A, and thiamine.
人们过于依赖某些特定的食物,导致了某些营养元素的匮乏,因此,以米饭为主食的人,很可能缺少蛋白质,维生素A和维生素B1
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Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.
VOA: special.2009.04.21
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Several studies have not been able to show that taking vitamin supplements in addition to a balanced diet helps to prevent disease.
VOA: special.2010.09.14
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That is,it is better to eat vitamin-rich foods to prevent disease instead of eating them to cure a disease after it has developed.
VOA: special.2009.04.21
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They taste good. And they contain a lot of carotene, which the body makes into vitamin A.
VOA: special.2009.02.24
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They play indoors. Everything's indoors. And so we're actually starting to see low levels of vitamin D in areas where the sun is plentiful."
VOA: special.2011.01.05
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They think these products, called vitamin supplements, will improve their health and protect against disease.
VOA: special.2009.04.21
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In some countries, milk producers add vitamin D to milk so children will get enough.
VOA: special.2009.04.21
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One study found that older Americans do not get enough Vitamin C and required minerals.
VOA: special.2009.04.21
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Ultraviolet light from the sun changes a substance in the skin into vitamin D.
VOA: special.2009.04.21
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And,they said vitamin D supplements and calcium can protect the bones of older women.
VOA: special.2009.04.21
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Bones need calcium and vitamin D to grow and reach their full strength.
VOA: special.2009.02.04
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People who do not get enough vitamin A cannot see well in darkness.
VOA: special.2009.04.21
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The word "vitamin" dates back to Polish scientist Casimir Funk in nineteen-twelve.
VOA: special.2009.04.21
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Vitamin D increases levels of the element calcium in the blood.
VOA: special.2009.04.21
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Vitamin A helps prevent skin and other tissues from becoming dry.
VOA: special.2009.04.21
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Cabbage is a good source of vitamin C and other nutrients.
VOA: special.2009.03.03
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Vitamin B-twelve is needed so folic acid can do its work.
VOA: special.2009.04.21
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They are high in Vitamin C, fiber and other nutrients.
VOA: special.2010.03.09
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Some older adults,for example, may not have enough vitamin B-twelve.
VOA: special.2009.04.21
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Vitamin D prevents the children's bone disease rickets.
VOA: special.2009.04.21
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Bacteria in the intestines normally produce vitamin K.
VOA: special.2009.04.21
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Many adults now take vitamin supplements every day.
VOA: special.2009.04.21
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Vitamin A is found in fish liver oil.
VOA: special.2009.04.21
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More than half of them took vitamin supplements.
VOA: special.2009.04.21
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The body stores little vitamin C.
VOA: special.2009.04.21
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