This rennet is a Double Strength Plus microbial "vegetable" rennet. All ingredients conform to organic standards. Gluten free, non-GMO, no caramel color. INGREDIENTS: Microbial rennet from Mucor Miehei and salt. YIELD: 1/4 teaspoon will set up to 2 gallons of milk. Two ounces contains approximately 12 teaspoons which will set up to 96 gallons of milk.