One thing not discussed here so far, which should be, is low blood pressure. It can mimic low blood sugar in many ways. The normal range for glucose (in Australia) is I think 5 to 7. I tested myself once during a hypoglycemic attack (a mild one) and it was 3.6 . You have to test when the symptoms are bad, but not so bad that the only thing you can think of is eating sugar. Glucose will quickly correct hypoglycemia, but protein gives sustained benefit. Glucose will wear off very quickly, and may even provoke another hypoglycemic incident.