Each brand is trying to find a way to get a leg up on the competition in a tight market space. The above picture is what I found on my last grocery run. What caught my eye was the asterisk next to the non-GMO popcorn claim. My guess was the ingredients list would include soybean, canola, or corn oil.
The temperature for broiling in an oven is 260 degrees Celsius or  500 degrees Fahrenheit. Medium heat is about 177 degrees Celsius or  350 degrees Fahrenheit.
London broil: how low and how slow? Following a variety of great tips, I cooked a London broil at 300 for one hour last night, to an internal temperature of 130. I let it rest 10 minutes before slicing it thinly. This was the juiciest and tenderest medium-rare London broil I ever ate, but that doesn't mean that it was as tender as filet mignon.