I'd say it would be great!
However, to date, no such thing seems to exist.
At least not in any way beyond that of unsubstantiated claims.
NB. There have been numerous people over the years who have claimed to have silver solutions that would never cause Argyria. Only to end-up not being the case at all.
Unfortunately, in cases such as these, accountability does little toward the damages caused in the end. Which is likely why many of us will take such claims with a grain of salt(pun).
I myself prefer to take-up the position of the skeptic.
Hopeful, but cautious, that's my motto. :)