Choy sum Choy sum Choy sum (also spelled choi sum or "Cai Xin" in modern Pinyin) is a leafy vegetable commonly used in Chinese cuisine. It is a member of the genus "Brassica" of the mustard family, Brassicaceae ("Brassica rapa" var. "parachinensis" or "Brassica chinensis" var. "parachinensis"). Choy sum is a transliteration of the Cantonese name (), which can be literally translated as "heart of the vegetable". It is also known as Chinese Flowering Cabbage. Choy sum is a green leafy vegetable similar to gai lan, and can be characterized by the distinct yellow flowers which it bears. Each flower has four
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