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Also reported in: pmol/L, mU/L
Your fasting insulin is within the standard reference range. In the lower half of this range, metabolic health is generally good. In the upper half (above ~10 mcIU/mL), early insulin resistance may be developing.
Very low fasting insulin means the pancreas is producing almost no insulin. Without insulin, glucose cannot enter cells — causing starvation of cells despite high blood sugar. This is the hallmark of Type 1 diabetes or late-stage Type 2 diabetes with beta cell exhaustion.
Seek emergency medical care if blood glucose is also high. Insulin therapy is immediately life-saving in this context.
Insulin: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})Very low fasting insulin in the presence of normal blood sugar is actually favorable — it indicates excellent insulin sensitivity (your cells respond to small amounts of insulin efficiently). However, combined with high glucose, it suggests insulin deficiency.
If blood glucose is normal, this is an excellent metabolic finding. If glucose is elevated, Type 1 diabetes workup is needed (GAD65 antibodies, C-peptide).
Insulin: {{value}} {{unit}} — below reference range (ref: {{low}}–{{high}})Low-normal fasting insulin alongside normal blood sugar is a marker of very good insulin sensitivity — your cells are responsive to insulin and not demanding excessive amounts of it.
Favorable result in the context of normal glucose. No action needed.
Insulin: {{value}} {{unit}} — borderline lowYour fasting insulin is within the standard reference range. In the lower half of this range, metabolic health is generally good. In the upper half (above ~10 mcIU/mL), early insulin resistance may be developing.
No action needed if in the lower half. If approaching 15–20, review diet and exercise habits.
Insulin: {{value}} {{unit}} — within reference rangeFasting insulin below 8 mcIU/mL indicates excellent insulin sensitivity — your cells are responding well to low insulin signals without requiring high insulin levels to manage blood sugar. This is strongly protective against diabetes and metabolic disease.
Excellent result. Continue the lifestyle habits that support this: regular exercise, whole foods, limited added sugar, and good sleep.
Insulin: {{value}} {{unit}} — optimal (2–8 mcIU/mL)Borderline high fasting insulin is an early sign of insulin resistance — your cells are becoming less responsive to insulin, so the pancreas compensates by producing more. This is an early warning stage of pre-diabetes and metabolic syndrome.
Reduce refined carbohydrates and added sugars. Exercise regularly (both aerobic and resistance training). Improve sleep quality. Address excess weight if present. Retest in 3 months.
Insulin: {{value}} {{unit}} — borderline highElevated fasting insulin is a clear marker of insulin resistance — the body is producing increasingly large amounts of insulin to keep blood sugar normal. This stage can persist for years before glucose becomes abnormal, but the metabolic damage is ongoing: weight gain, inflammation, and cardiovascular risk are all elevated.
See your doctor. Calculate HOMA-IR (a score that estimates insulin resistance). Begin aggressive lifestyle intervention: low-refined-carb diet, regular exercise, and weight management. Intermittent fasting can also noticeably improve insulin sensitivity.
Insulin: {{value}} {{unit}} — above reference range (ref: {{low}}–{{high}})Very high fasting insulin indicates either very noticeable insulin resistance (often with profound metabolic syndrome and obesity) or an insulinoma — a rare tumor that secretes insulin uncontrollably, causing dangerous hypoglycemia.
Seek urgent medical evaluation. If you're experiencing hypoglycemic episodes, this needs immediate investigation for insulinoma. Otherwise, comprehensive metabolic evaluation and aggressive treatment of insulin resistance are needed.
Insulin: {{value}} {{unit}} — very high (ref: {{low}}–{{high}})Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.