Our shelf life is like none other. The combination of the microbes used in BUD BIONICS are encapsulated and remain dormant until activated by water. Once the specific formulated microbes are released from the water activation process they have the ability to become self-splitting and creating multi-billions (not millions like some others) of microbes. Unlike our some of competitors, our product is not manufactured in its diluted form giving it a much longer shelf life. Essentially, our product shelf life begins when the water activates the microbes at a rate of 640 times concentrate.