This is an Organic Double Strength rennet that contains no animals products. GMO and Gluten Free. Dosage: 1/6 tsp sets 2 gallons of milk in 45 minutes. Directions: Dilute rennet in 20x its volume of cool, potable water. Add to milk and stir 2 minutes to distribute. Storage: Store rennet in refrigerator, best if used within 7 months.