The Office of Dietary Supplements at the NIH recommends that we get certain levels of a variety of kinds of vitamins, and that recommendation is sound.

NIH的食品补充剂办公室(ODS)建议人们摄入一定量的各类维生素，这个提议是合理的。

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"The fairly simple answer is, not much," says Paul Thomas, EdD, RD, scientific consultant with the National Institutes of Health Office of Dietary Supplements.

“非常简单的答案是，不需太多。”美国国立卫生研究院饮食补充办公室科学顾问教育学博士兼注册营养师Paul Thomas说。

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However,the Office of Dietary Supplements of the National Institutes of Health notes that pregnant women may want to avoid it.

VOA: special.2009.05.19

In response to the debate, the National Institutes of Health's Office of Dietary Supplements last year began an intensive effort to learn more about vitamin D, partnering with other federal agencies to assemble a panel to assess research needs and priorities.

CNN: Vitamin D is hot! Here's how to get it