Two methods for eliminating aflatoxin M1 (AFM,) from naturally contaminated raw whole milk (NCRWM) were examined. One involved chemical elimination using potassium sulphite (K2SO3), the other physical adsorption of the toxin using bentonite. Maximum elimination of AFM t (percent of total eliminated) for the chemical method was 45% using 0.05M K2SO3 (25 °C, 5 h). Possible mechanisms responsible for degradation of AFM, by K2SO3 may involve reactions between the toxin and the bisulphite radical (HSO3 −. Maximum elimination of AFM1 (89%) by bentonite was achieved using 0.4 g of bentonite per 20 ml of NCRWM (25 °C, 1 h).