Insulin in Serum
Insulin ranges
The unit conversions provided here are correct. According to this research, most other online converters apply incorrect conversion factors for insulin.
What a low value may mean:
Common reasons for low Insulin:
Decreased insulin in a lean, metabolically healthy person means the body needs very little insulin while fasting (very good insulin sensitivity), usually seen in athletes or those on a low carbohydrate diet.
Low fasting insulin reflects reduced pancreatic beta-cell output. Causes include type 1 diabetes (autoimmune beta-cell destruction), advanced type 2 diabetes with beta-cell exhaustion, LADA, pancreatic disease, and hypopituitarism.
Prolonged fasting (beyond the standard 12 hours) can also drive values very low.
What a high value may mean:
Common reasons for high Insulin:
High fasting insulin (hyperinsulinemia) most commonly reflects insulin resistance — the pancreas produces more insulin to keep glucose controlled. This can appear before fasting glucose or HbA1c become abnormal.
It is commonly seen with abdominal obesity, metabolic syndrome, fatty liver, early type 2 diabetes, and PCOS. Less common causes include insulinoma, insulin-releasing medications, exogenous insulin, Cushing syndrome, acromegaly, reduced insulin clearance, and assay interference.
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