I personally haven't heard of this - so I googled.
it is an emzyme made from silk worms and claims to be good for inflammination and dead tissue removal and removing the pain in the process. It has been around since the 40's
Hey it's probably worth a try.
A natural combination I find works very well is a juice made of 2 sticks of celery( including the leaves), one apple, one large carrot, and a nob of raw ginger root
Sound very interesting.
Where did you hear about it?