Microbial Lab Valirene is a food enzyme obtained by the controlled fermentation of special strains of Rhizomucor miehei. It contains the specific protease activity that makes it effective as a milk clotting enzyme. Valirene complies with FCC recommended specifications for food enzymes. Our products are kosher and halal certified. Use a bag for 100 litres of milk. 5 bags coagulate up to 500 litres of milk. If you have any problems with this microbial lab, you can return it at any time for a full refund.