BHA (butylated hydroxyanisole) and BHT (butylated hydroxytoluene) are also common preservatives in pet food and are currently labeled by the World Health Organization and the State of California as carcinogens. (topdogtips.com)
They are some of the most common preservatives found in human food however there is some speculation regarding these preservatives of late as potential carcinogens. (professorshouse.com)
Parabens used to be the most common preservative because they're so effective and inexpensive, but in recent years they've been shown to mimic estrogen, causing breast cancer tumors and increasing prevalence of early puberty in girls. (mindbodygreen.com)