Why does lactose-free milk turn up as positive on a glucose strip?

Glucose is a simple sugar that is found in many foods, including milk. Lactose is a complex sugar that is found only in milk and milk products. When lactose is broken down, it produces glucose and galactose. Glucose is then absorbed into the bloodstream and used for energy.

Lactose-free milk is milk that has had the lactose removed. This is done by adding lactase, an enzyme that breaks down lactose, to the milk. Lactose-free milk should not contain any lactose, so it should not turn up positive on a glucose strip.

If lactose-free milk is turning up positive on a glucose strip, it may be because the milk is not actually lactose-free. It is also possible that the glucose strip is not working properly. If you are concerned about the accuracy of the glucose strip, you should contact the manufacturer.