Definition of «oral glucose»

"Oral glucose" refers to a form of sugar that is taken by mouth.

Does it also change the response pattern of insulin during a five hour oral glucose tolerance test? (idmprogram.com)
After the 8 week period, both groups of women were tested using fasting and 2 - hour oral glucose tolerance tests. (natural-fertility-info.com)
Even if the dog is given oral glucose, blood sugar levels remain low. (everydayhealth.com)
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