Page "Hypoglycemia" Paragraph 54

Part of the value of the critical sample may simply be the proof that the symptoms are indeed due to hypoglycemia.

More often, measurement of certain hormones and metabolites at the time of hypoglycemia indicates which organs and body systems are responding appropriately and which are functioning abnormally.

For example, when the blood glucose is low, hormones which raise the glucose should be rising and insulin secretion should be completely suppressed.