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May 26, 2001

Blood Tests and Insulin Injections

Question from Garwood, New Jersey, USA:

How accurate is a blood sugar test on a sample taken six months ago, but kept refrigerated? Would the levels change from the day it was taken?

Answer:

The result on testing blood glucose in a six month old sample would be meaningless. There would probably be no glucose in the sample as the glucose is used up by the blood cells.

JS