The present disclosure proposes an antihypertensive component and a method for increasing the content of EA in the shiitake mushroom mycelium culture. The antihypertensive component according to an exemplary embodiment of the present disclosure contains both of shiitake mushroom mycelium culture and natto bacteria culture, and has an effect of enhancing antihypertensive efficacy by thrombolysis ability of the natto bacteria culture, even though the EA content may be lowered by combination of the natto bacteria culture.
