i've never seen PFS with anything added, not sure there even is such thing, but if there were anything like that on the bag it wouldn't be a good idea. I've used 3 different brands of PFS. Leslies was one of them, but the other two I can't remember. I paid $1.99/50lbs for some, same exact stuff (i think it was the same as leslies without their name on it).