To provide health food and health tea each capable of suitably demonstrating effect against cold and influenza in addition to prevention of cancer and viral infectious disease.

The health food contains a mushroom group consisting of Agaricus blazei Murill, Fomes yucatensis and Hericium erinaceum, and echinacea. The action effect of the mushroom group can increase immune strength of a living body, inhibit growth of cancer cell and prevent viral infectious disease. The action effect of echinacea can improve immunity against cold and influenza.