How does the hormone glucagon affect blood sugar levels in diabetes?

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Dr. Jack Merendino, MD
Endocrinology Diabetes & Metabolism
Glucagon is the second most important hormone related to blood sugar control. Unlike insulin, which lowers blood sugar, glucagon raises it, and it can be used for the treatment of low blood sugar in an emergency. Under normal circumstances, glucagon is one of the hormones that helps balance insulin, preventing the blood sugar level from going too low. While glucagon plays an important role in balancing insulin under normal circumstances, there is evidence that too much glucagon production contributes to high blood sugar levels in many people with diabetes.
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