vitamin deficiency

基本解释

The integumentary system (which includes hair and nails) is often the first place that a serious vitamin deficiency shows up.
当维生素缺乏时，首先会变现在表皮系统（包括毛发和指甲）。
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。
Don: Vitamins, Yael. I'm really into my health these days. I take a pill for nearly every vitamin my body needs. I'm insuring myself against vitamin deficiency.
维他命。这些天我很关心我的健康。我吃的这药片几乎涵盖了所有我身体需要的维他命。我正在预防维他命匮乏。

Each year an estimated two hundred fifty thousand to half a million children go blind from vitamin A deficiency.
Extreme vitamin D deficiency causes deformities in children and weak bones in adults.
Doctors rarely see these conditions. But studies have linked vitamin D deficiency to a number of serious health problems, including heart disease, several types of cancer, osteoporosis,diabetes, Alzheimer's disease and some autoimmune disorders.

Growing evidence is suggesting that vitamin D deficiency is more common that previously believed, and that vitamin D may play an important role in many common diseases such as heart disease and cancer.
FORBES: Vitamin D: Still More Questions Than Answers