A pharmaceutical composition for preventing or treating steroid-induced diabetes (SID) and a health functional food, and more particularly to a pharmaceutical composition for preventing or treating SID and a health functional food, contain a Ceriporia lacerata culture extract as an active ingredient. The pharmaceutical composition and the health functional composition have the effect of protecting INS-1 insulin-secreting cells by blocking the steroid-mediated proliferation inhibition and apoptosis induction of INS-1 insulin-secreting cells. Thus, the pharmaceutical composition and the health functional composition can be developed as the active ingredient of pharmaceutical or functional food compositions serving to protect or regenerate β-cells by blocking the steroid-mediated growth inhibition and apoptosis of β-cells.
