I dust bee pollen on salads because Ardie seems like it a lot more, and it doesn't hurt to naturally add more nutrients to plain ol' kale (which is presently all I have to offer him at the moment; at his age, he wouldn't eat more than a few sprigs, I found). I feed phoenix worms and silkworms (which already have a good calcium to phosphorus ratio) as staples, so I don't dust them at all (though they may pick up some pollen if I mix them in the salad of course, lol).
But when I finally get roaches, I will be dusting them with calcium for sure just to be safe since their ratio is not good without dusting.