I've always thought of it as a digestive enzyme, but a naturopathic doctor just recommended it to treat a deep vein thrombosis. It's too expensive me to use for that purpose -- it would cost about $80 a month -- but I wouldn't be afraid of it in a protein powder. On 11/26/1999 , Heathen Girl wrote: >I was looking around a web site and found some protein powder that had >this substance in it.