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What are BHA and BHT and why are they in my pet’s food?

Two ingredients you should avoid when buying pet food BHA (butylated hydroxyanisole) and BHT (butylated hydroxytoluene) are preservatives added to a wide variety of processed foods to keep them from going rancid or changing flavor, odor, and color, especially those foods containing oil or shortening.  Though widely used by food manufacturers, despite the fact that safe alternatives are available, many research studies indicate BHA and BHT are carcinogens. The FDA considers these additives safe, but the World Health Organization’s International...