see gow chai.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.
One cup of raw bok choy has only 9 calories, but includes 63% of your daily vitamin A and more than 50% of your vitamin C needs. It also has calcium and iron -- talk about a nutrient-rich leafy green!