in some of the older [dr.binzel laetril]for cancer and todays cures they used enzymes .tryson and crymotrypson were the ones that melt the protein coating off cancer and cut the sticky fibrin off blood .nattonase and other enzymes have been added to other antiviral enzyme compounds .enzymes are deffinetly good to add to most cancer and viral protocols .taken on an empty stomock 1 hour befor meals and if you can take some with meals to help get the most nutrition out of your foods and help out the bad stuff in the foods