Analyzing 30 samples of edible oils including Gac oils, the use of BHT was determined in two samples with 45 - 55mg / kg, which is 1/3 of the regulation of 3742/2001/QD-BYT and BHT was also found in 2 food canned samples of oil immersion fish at the concentration of 1 - 2 mg / kg, lower than the regulation.