The amount of water in breast milk varies between 80–90% water depending on each unique expression. There are many factors that contribute to the nutrition density of breast milk from the stage of which you are producing, morning or night expression, diet and personal hydration levels. Your milk is unique to you and your baby. Having the accurate water ratios for your milk is important when feeding an infant. When freeze drying breast milk, you need to choose a freeze dried breast milk company that takes water weight extraction calculations pre and post freeze drying. Not a standard 1/10 or average ratio. For the most accurate water amounts, choose to have your frozen milk processed bag for bag so each unique milk pouch retains its original hydration ratios.