Bok choy of the Daily Value, DV) of vitamin A (30% DV), vitamin C (54% DV) and vitamin K (44% DV), while providing folate, vitamin B6 and calcium in moderate amounts (10–17% DV) (table). Chinese cabbage was ranked #2 for nutrient density out of 41 nutrient-rich plant foods. Bok choy contains glucosinolates. These compounds have been reported to prevent cancer in small doses, but, like many substances, can be toxic to humans in large doses, particularly to people who are already seriously ill. In 2009, an elderly diabetic woman who had been consuming 1 to 1.5 kg of raw bok choy per
Fat choy For that reason, this product is a popular ingredient in dishes used for the Chinese New Year. It is enjoyed as an alternative to cellophane noodles. It is mostly used in Cantonese cuisine and Buddhist cuisine. It is sometimes used as a hot pot ingredient. Fat choy is also used in Vietnamese cuisine. It is called "tóc tiên" or "tóc thiêng" (literally "angel's hair") in Vietnamese. No significant difference between laboratory rats fed "Nostoc flagelliforme" and the control group was found in a study by Takenaka and coworkers. Fat choy Fat choy (; "Nostoc flagelliforme") is a terrestrial cyanobacterium (a