One hundred eighty one samples of food and feed products were collected from some provinces in northern Vietnam. Natural occurrence of aflatoxin B1 and ochratoxin A were surveyed in 26 samples of peanut kernel, 55 samples of animal feed, 20 samples of peanut products including peanut candy and fried peanut, 15 samples of soybean products including soybean powder, compressed soybean cake and soybean meat, 15 samples of maize products including nutrient corn powder and fried maize, 18 aflatoxin B1 at average concentrations of 43ƒÊg/kg and 12ƒÊg/kg, respectively.