Bok Choy is great for the digestive system because of the amount of fiber it contains. This Chinese cabbage is also good for eye health, blood pressure, weight loss, milk production is new mothers, and general immune system support. Bok Choy is a great source of vitiman A, C, K, thiamin, riboflavin, folates, niacin, calcium, iron, magnesium, manganese, phorsherous, and zinc.