As I understand, the body has mechanisms to safely eliminate some low amount of nano silver. I don't know if the exposure from this material as clothing would exceed any safe threshold.
> human body doesn't use silver. At all. Which means it accumulates over lifetime.
The human body has diverse ways to excrete things many that it doesn't use, namely by urine, stools, sweat, and bile. Kidneys, liver, and intestines specialize in it.
<<Up to a point, excess silver is excreted out>>, although other things like various forms of PFAS are not.
All of those things you described happen in food pipeline, something nano size that could even come through your lungs would cross into soft tissue and individual cells and live there forever never to be excreted, again see microplastic in sperm and placenta
2) nano means it is not subject to elimination by food pipeline. It will cross into tissue and stay there, addition only.