Someone told me you aren't supposed to use the first drop of blood that comes out of your finger after you prick it. Is this true. My readings don't seem to change one way or another.

Farrah M


Hi there and thanks for the question! I have not heard of this before but you can always consult this with your doctor to confirm.

April 16, 2012 at 12:55 pm

1 reply

MAYS 2012-08-24 12:39:56 -0500 Report

There is no general agreement regarding the use of the first or second drop of blood for glucose monitoring. This study investigated whether capillary glucose concentrations, as measured in the first and second drops of blood, differed ≥10% compared with a control glucose concentration in different situations.

We recommend washing the hands with soap and water, drying them, and using the first drop of blood for self-monitoring of blood glucose. If washing hands is not possible, and they are not visibly soiled or exposed to a sugar-containing product, it is acceptable to use the second drop of blood after wiping away the first drop. External pressure may lead to unreliable readings.