What Are Normal Serum Insulin Levels?
5-20 mcU/mL while fasting; normal ranges may differ by the laboratory of the health care provider.
Note: mcU/mL = micro unit per milliliter
What abnormal results mean
Greater-than-normal levels may indicate:
-
Insulinoma -
Type 2 diabetes mellitus -
Obesity - Injection of an excessive amount of insulin
- Sulfonylurea-induced hypoglycemia
Lower-than-normal levels may indicate:
- Diabetes, type 1 or 2
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