Gold is inert.
It can't react within the body. It would either puddle somewhere or be gathered up and passed.
I can't imagine it can have a medicinal effect. It would be very interesting to see proof of it, though (beyond the rantings and oaths of some holistic healer).
They ought to be feeding shark cartilage to the lion. But, oh no, PC conflict. (Head spinning.)
Actually, gold therapy has been around for a long time.
I have no idea how it works (or if), but it's not new.
Odd, I thought colloidal gold was a common part of cancer treatments?