BHT Butylated Hydroxy Toulene (BHT) is used as an antioxidant to retard the rancidity of oil and fats in foods. With emulsifying and stabilizing agents, BHT is a preservative to help maintain the appearance of freshness and consistency of food. BHT is a fat-soluble white crystalline solid that was approved as a food additive and preservative by the U.S. Food and Drug Administration in 1954. There is no taste to the additive. It is a Generally Recognized As Safe (GRAS) additive and with no scientific data proving its carcinogenicity, whether it causes cancer. "Bioassay of Butylated Hydroxytoluene (BHT) for Possible Carcinogenicity." National Institutes of Health 150 (1979). Print. "Butylated hydroxytoluene." EncyclopÃ¦dia Britannica. EncyclopÃ¦dia Britannica Online. EncyclopÃ¦dia Britannica, 2011. Web. 16 May. 2011. .