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. 15 Sachets will coagulate up to 1500 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.