[Bruce pauses a little at the question, mulling it over, finding the best words to describe it. All the jargon about magic tends to fly over the heads of anybody who doesn't use magic, after all.]

Whatever it is the body has that allows natural healing to happen in the first place. [A small shrug comes after this, though.] It would be nice if I had a better answer to that, but that's really the best I can think of.

[But with that said, her words are appreciated, and Bruce manages a smile.] In the end, I just do my best in whatever capacity I'm allowed to help. I just hope it helps in some fashion.