Re: Will my skin turn blue only by topical use?

Not sure if this applies to topical used as I don't think there's ever been a documented case of skin discoloration as a result of Colloidal Silver application. Though I'm going to venture that even if this were possible, that it wouldn't likely be permanent given that the effect would be bound to the surface of the skin. Which is unlike Argyria due to excessive silver intake, which comes out of the skin from within the body.

That said, I'd also add that 15ppm is quite low in terms of silver content and won't likely ever cause issues with topical application no matters the amount or frequency.

Hope this helps