关键点：K1和K2在人体內存量很少，几天不进食就会缺乏。靠脉管营养的患者，一定要注意补充。

https://www.winchesterhospital.org/health-library/article?id=24861

Vitamin K is a fat-soluble vitamin. Fat-soluble vitamins are stored in the body in the liver and fatty tissues. Unlike the other fat-soluble vitamins, the body actually stores very little vitamin K. This makes regular dietary intake important. Bacteria in the large intestines help by making a range of vitamin K forms called menaquinones. Vitamin K is also produced by plants (phylloquinone) and is primarily found in green vegetables, brussels sprouts, cabbage, and plant oils. The man-made vitamin K found in supplements is called menadione.

 

下一篇比较专业，适合教授

https://lpi.oregonstate.edu/mic/vitamins/vitamin-K