Cordyceps stroma or "fruit body" is the mushroom part of the Cordyceps. The stroma grows from the head of the caterpillar corpse (which has been replaced by organic medium) when the Cordyceps becomes mature. In fact, the stroma is equivalent to the fruit on the fruit tree, and the mycelium of the caterpillar corpse (which has been replaced by the organic medium in our stroma cultivation process) serves to provide nutrition to the fruit. In fact, the most effective and potent elements are concentrated inside the fruit body.