The suspicious ties between PCRM and PETA notwithstanding, the entire basis for their lawsuit against fast food companies rests on quicksand. They claim tests revealed PHIP, a possibly carcinogenic compound, to be found in the chicken at major fast food chains.
But commenter Mike M says, “I’m a chemist, and I can say that Phip is in nearly every protein-based food that is grilled (perhaps even including grilled tofu).”
Besides, PHIPS has only been shown to be a possible initiator and promoter of prostate cancer in rats.
So as long as you’re not a rodent in a cancer experiment, you should be all good.