Any fertilizer should be fine, I don't think there isn't any labeling requirements for fertilizers to specifically mention food crop use. Let us know if you see any difference with that stuff, I saw it in an industry magazine...sounded like snake oil to me, or at least not worth the $$$.
Just watch out for any fertilizers that have added insecticides or fungicides, to my knowledge none of those are safe for use on food crops. Usually they are called something like "2 in 1" or "3 in 1" insect/disease control.