ENZECO® Purified Papain RS Concentrate is a papain that is processed without the use of sulfites. The papaya latex in this product has been processed without the addition of sodium metabisulfite. This results in papain with substantially reduced levels of SO2.This product contains only the botanical enzymes and has no other ingredients. It has earned an OMRI listed® certification, which means that it may be used in certified organic operations or food processing under the USDA National Organic Program.