I would have to be very much assured that this gel was not going to clog up my arteries before I consented to having it injected into my veins.
I can also imagine that it might clog up the capillaries of the lungs or any other organ. Unless this gel can be shown to only deposit in a very specific place where it could do no harm I can not see it being safe to use.
As I read this short article, I was thinking the same thing. If you and I are thinking about it (Clogging up the vascular system), presumably the brains behind this are also thinking about it. If this hurdle can be solved, cool beans. If not, well, it’s back to the drawing board.