The fruiting body is the "fruit" part that grows on the Antrodia cinnamomea wood; the mycelium grows on the culture medium to absorb nutrients from the wood. It can also be said that the mycelium plays the role of a delivery tube, and the real nutrients are in the fruiting body, just like we eat fruits but not rhizomes. The formation of mycelium is easy and fast, and it can grow in about 7-14 days. It can even be directly cultivated using public version bacteria. This is why there is a huge difference in the "Antrodia cinnamomea price difference".