Cigarette smoke-free radicals can cause lipid peroxidation and pathological changes in lung cells. This effect could be prevented by highly active metabolitc in Pleurotus ostreatus such us fcnol, ascorbid acid, selenium, and ergothiene. This study aimed to analyze the effect of the Pleurotus ostreatus extract on the levels ofmalondialdehyde (MDA) and surface density (SlY) after exposure to ciga…