250,000 SPU's Dietary Supplement Pharmaceutical Grade Non-GMO Vegan Kosher - Star-K GRAS - Generally Recognized As Safe Serretia Supports: Accelerated Healing Healthy Sinus Activity Normal Fluid Retention (swelling) Free Joint Mobility Post Surgical Recovery Serrapeptase is a protein digesting enzyme, originally discovered in the larvae of silkworms. This enzyme has powerful mucolytic (mucus dissolving) properties capable of promoting healthy sinus activity. Serrapeptase is clinically shown to promote a normal inflammatory response and healthy blood flow. Serretia is a vegan-friendly pure serrapeptase harvested from a microbial fermentation process. To date, Serretia is the strongest serrapeptase product commercially available.