It’s true. Planters uses gelatin in their dry-roasted peanuts. I first read this in my new favorite magazine, Vegetarian Times. Evidently it helps the spices adhere to the nuts. I’m not sure if it’s from meat or not, but most products using gelatin use meat-derived gelatin. By the way, the “K” on products does not mean that there is no pork, as they allow for trace amounts of it.
Publix brand dry-roasted peanuts, as well as the generic brand carried by Winn-Dixie, do not contain gelatin. I always got the Publix brand anyways because they have a “lightly salted” option, instead of just “salted” (meaning sodium attack salty), and “unsalted.”
So keep that in mind if you want to make the recipe found a couple posts down and want to keep it gelatin-free.