In that light, aging itself might be seen as something treatable, the way you would treat high blood pressure or a vitamin deficiency.

从这个角度来看，衰老本身可能是可以治疗的，就像治疗高血压或维生素缺乏症那样。

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In parts of South America, vitamin-A deficiency is a serious health problem, especially among children.

在南美部分地区，缺乏维生素 A 是一个严重的健康问题，尤其在儿童之中。

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To assess the relationship between the prevalence of vitamin a deficiency among pregnant women and the effect of neonatal vitamin a supplementation on infant mortality.

评估孕妇维生素a缺乏症发生率和新生儿维生素a补充对婴儿死亡率的影响之间的关系。

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Overall, those most at risk for a vitamin-D deficiency were older, female, obese, drank milk less than once a week, and spent more than four hours a day watching TV, playing video games, or working on a computer.

CNN: Vitamin D deficiency common in U.S. children

However, a vitamin B-12 deficiency is most often due to a lack of a substance called intrinsic factor.

CNN: Vitamin deficiency anemia

Whether or not Clemens can demonstrate a vitamin B-12 deficiency, he is going to have to contend with questions about why chose injections of a vitamin that is found naturally in meat, fish and dairy products or in commercially-produced and readily-available pill form.

FORBES: Clemens Could Pay Political Price for Business Success