My husband has been using them for over two years and loves them. Look under their specific names (use the search function on this forum)--
Ones I've written about and included research papers for are serrapeptase, nattokinase, bromelain, papain--
they are natural anti-inflammatories and regulate blood coagulation. Also natural anti-virals and protein-eating.
I write about the reasoning for using proteolytic enzymes in The Endothelial Health Program. It's available online at www.ccsvi.org
under "helping myself"--