vitamin D 2

a study of nearly 2, 000 people last year suggests that vitamin d -- the "sunshine vitamin" -- could help keep your brain sharp.

去年一项样本量为2000人的研究表明，维生素D，也称为“阳光维生素”，能够帮助保持头脑健康灵敏。

Food additive -- Vitamin D 2 ( Ergocalciferol )

GB14755 -1993 食品添加剂维生素D2 ( 麦角钙化醇 )

moreover, vitamin d levels of less than 10 nanograms per milliliter increased from 2 percent to 6 percent over the study period.

此外，在该研究的时间跨度内，维生素D水平低于每毫升10纳克的人从2%升高到6%。

although consumers may be tempted to rush out and start taking 2, 000 i. u. 's of vitamin d a day, doctors warn against it.

消费者可能会被诱惑，购买并开始每天服用2000国际单位的维生素D，但是医生对此发出警告。

However, if you don't eat enough fortified foods and have limited sun exposure, you may need supplementation with vitamin D-2 ( derived from plants).

但如果你没有食用足够的加维生素D食物且没有足够的日晒，你可能需要补充维生素D-2（从植物中获取的，属于素食范围）。

An innovative process for synthesizing vitamin D 2 by photochemical reaction is also put forward.

同时还提出一条光化学合成维生素D2的创新技术路线.