Powdered nano silver is much harder to make and a lot more expensive than the liquid stuff.
Earthpaste contains liquid nano silver. But the liquid variety of nano silver wouldn't work in Earthpowder for obvious reasons (a liquid + a powder= a heck of a mess).
Now, it is possible to make powdered nano silver. But it's much harder and a lot more expensive than the liquid stuff.
So for now, we've decided to keep Earthpowder silver-free. That may be something we revisit in the future (you'll be the first to know if we do!).
If you really want to add silver to your oral health routine but you love your Earthpowder too much to give it up, you could put a teaspoon of colloidal silver in your mouth before you begin brushing.