Numerous studies have examined corrosion in composite construction materials.and composites with cement and polymeric binders have been the most investigated.Material robustness with magnesia binders and millimeters needs additional research.The only known stability of mycelial fungus is amid continual dampness.These chemicals can promote microscopic development under adverse conditions.The metabolic byproducts of these organisms can modify material properties.This study examined magnesia composites' resistance to mycelial fungus breakdown in a simulated environment.focused on exoenzyme concentration during exposure.Several citric acid and hydrogen peroxide combinations in water were tested for biocorrosion potential.The experimental design matrix determined aggressive midrange component ranges.Caustic magnesite with salt chloride was investigated.The composites contained quartz.dolomite.pine sawdust.and sifting granite crushed stone.Composite biostability was measured by sample mass content and strength variations in hostile conditions.Assertive media damaged all composite compositions from the start of sample exposure.Dolomite-loaded magnesium composites withstand better.They need to be more durable.Magnesia composites can be used in biologically active constructions with particular protection.Graph-analytical methodologies and experimental planning were used to determine composite preference.The dolomite composite was the most durable.Monitoring mass content and resistance coefficient during tests can be used to evaluate composite quality using statistical processing.