Help! How do I get blood out of upholstery?
It works. But buy the unseasoned, colorless stuff. Make a paste and keep rinsing it and soaking out the water and residual stain. It breaks down the proteins and works on dried blood. I use peroxide for new stains. If you want to know how meat tenderizers work, check out this site: http://www.wisegeek.com/how-do-meat-tenderizers-work.