We NEVER use any nano sized particles in any of our products.
Why is that?
Researchers in Finland and the US studied how certain nanoparticles interact with cells. Results indicated that nanoparticles may alter cell structure, causing the cells to die. Currently, nanoparticles are widely used in cosmetics, electronics, optical devices, medicine, and in food packaging materials. Nanoparticles may well be the asbestos of the twenty first century: a considerable threat to people`s health.
We consider them un-safe, and don't see any benefit from using them.