Most people need at least 1,000 IU daily—more than you get from foods and most multivitamins.

大部分人每天所需维生素至少为1000个国际单位——比你从食物和大多数维生素剂所得到的要多。

youdao

The American Academy of Pediatrics recommends that breastfed infants receive a vitamin D supplement of 400 IU per day.

美国专业儿科推荐喝母乳的婴儿每天需要摄入400个国际单位的维他命D.

youdao

The IU researchers created a virtual environment in which 20 to 200 people “forage” for ideas.

印第安那大学的研究人员创造了一个虚拟环境，在其中20到200人搜寻各自的理念。

youdao

Some suggest as much as 10, 000 IU --currently the tolerable upper intake daily.

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

The IOF estimated that doses of 800 to 1, 000 IU (20-25 mcg) or higher may be required in older adults to prevent fractures and falls but stated that more research is necessary.

CNN: How much vitamin D do I need?

However, he said, there's no harm in taking a 200-IU dose of vitamin D because it's difficult to get the recommended daily amount of 600 IUs from food alone for children and adults up to age 70.

WSJ: Vitamin D and Calcium Supplements May Not Stop Fractures