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blood interacts with the chemicals on the test strip, the reaction creates a measurable electrical charge which changes depending on the glucose level in the blood. The meter reads the level of that electrical charge and converts it to a blood glucose reading in understandable numbers.
I believe most strips use glucose oxidase, an enzyme that produces gluconic acid from the glucose in the blood. But I haven’t researched new test strip tech in years.
Wow, people are still using this lame copypasta?