A superior milk coagulant, this product is a Passover Approved, fermentation-derived product, made using a selected strain of the dairy yeast Kluyveromyces lactis. This patented product, awarded GRAS status by the… [Read more] FDA, is pure chymosin identical to the chymosin enzyme present in calf rennet. Unlike calf rennet, however, this is 100% pure chymosin. Developed by DSM Food Specialties, the world leader in fermentation technology, this is suitable for all varieties of cheese, including aged and vegetarian cheeses.