It results from a vitamin deficiency.

它是由维生素缺乏引起的。

Just as vitamin deficiency can make you sick so can vitamin toxicity.

就象维生素匮乏一样，维生素的毒素一样会使你生病。

Just as vitamin deficiency can make you sick, so can vitamin toxicity.

就如缺乏维他命会使你生病一样，维他命中毒也会令你生病。

Deficiency is the most frequently encountered vitamin deficiency in the U.S., but vegetarian women consume more folic acid on average than meat-eaters.

缺乏叶酸是美国最常见的维生素缺乏症，但食素的妇女比食肉的平均叶酸食用量要多。