Microdot Xtra Blood Glucose Test Strips 50 Strips per Pack For Meters - 50 Count VialBlood Glucose Test Strips Microdot Xtra 50 Strips per Pack For Microdot Meters Each Microdot strip contains the enzyme glucose dehydrogenase (Bacillus Sp.) = 1 IU and other ingredients (mediator, NAD, lysing agents etc.) = 200 g When blood is added to the Microdot strip, the chemicals within the strip react to create a tiny electrical current Your meter reads the current and displays your level of blood glucose