King oyster mushroom is richer in vitamin B than other mushrooms. Especially it contains very much content of B and C. In terms of vitamin C, it contains 7 times as much vitamin C as oyster mushroom, and 10 times as top mushroom.

* Information about mushrooms other than king oyster mushroom is quoted from nutrition facts table by Rural Life Research Institute.
 

This analysis shows that king oyster mushroom contains total 26 kinds of various amino acid. Particularly it contains 9 kinds of essential amino acid, so it's very highly-valued food.