Stephen Henning wrote:

As one reviewer explained: "The scientific claims in the product
description defy belief. By the time the symptoms associated with
poision oak (ivy or sumac) show up, the urushiol has already been
metabolized and gotten rid of. If you're itching, you don't need
something to bind to and defeat urushiol, you need something to relieve
the skin that has reacted to one of the already-excreted breakdown
products of urushiol metabolism."

What is an "excreted" product of urushiol "metabolism" ??

My understanding of the mechanism of poison ivy rash is quite
different. The skin is not "reacting to" an "excreted product" of
"urushiol metabolism". Rather, the urushiol binds to the skin cells,
and the body's immune system no longer recogizes them as being part of
your body... so the immune system attacks the cells, causing the rash
and the itching. Once the affected cells have been destroyed, the
immune reaction stops and the rash clears up.

Is the above description now history, and the new theory about excreted
products of urushiol metabolism now the accepted explanation?