It was on the chemistry of collagen and with some discussion of existing use cases. No, I didn't cover collagen specifically in blood vessels but rather physics and chemistry properties of it, synthesis of it. This touched on biological pathways.

The only thing I can think of supporting Rose is if the collagen is excessively mineralized, but she should have brought that up and asked why the body would produce such a version. If it is calcium mineralized, then use of chelating substances like EDTA would help reduce the clogs. That can be tested.

It was on the chemistry of collagen and with some discussion of existing use cases. No, I didn't cover collagen specifically in blood vessels but rather physics and chemistry properties of it, synthesis of it. This touched on biological pathways.