Here is one possible approach to answering Vince's question by experimentation: Remove the particulate fraction from some LVDC EIS by ultracentrifugation and/or dialysis with a suitable membrane. Take a blood sample before ingesting the particulate-free EIS. Take another blood sample after ingesting the particulate-free EIS. Put both blood samples in turn in a Von Laue camera. If the x-ray diffraction reveals the powder pattern characteristic of silver in the later blood sample, but not in the earlier sample, then this is evidence that the ions formed particulate in-vivo.
This provisional procedure may, of course, need some refinements. It is just a first essay. Best regards, Matthew
