Valiren is a food grade enzyme derived through the controlled fermentation of special strains of Rhizomucor miehei. It contains the specific protease activity that makes it effective as a milk clotting enzyme. Valiren complies with FCC recommended specifications for food grade enzymes. Our products are Kosher and Halal certified. Use one sachet for 100 Ltr of milk. 5 Sachets will coagulate up to 500 Ltr of milk. If you have any issues with this microbial rennet at all, you can Return it at any time for a FULL REFUND, No Questions Asked.