Freeze drying Breast Milk utilizes sublimation, a process that takes breast milk into sub-zero temperature (-40f) and gently applies warming pulses to the product to transition the frozen water directly into vapor skipping the liquid state. The water vapor is then captured on the outside cylinder and frozen. Dehydration is a low temperature warming process that keeps liquids in the danger zone (125F-130F) for extended periods of time. It is not suitable for human breast milk and infant consumption due to the bacterial, mold and yeast growth risks. Dehydrating also does not reduce Water Activity levels low enough for safe long term storage. Freeze Drying Breast Milk effectively removes water, while retaining nutrition, halts bacterial, mold and yeast growth when Water Activity levels reach below .6AW per FDA guidelines and halts lipase enzyme, when powder reaches a Water Activity below <.19AW.