What is Fasting Serum Insulin (Fasting Insulin)?
Fasting Serum Insulin is measured as part of a diabetes & blood sugar panel. Your fasting insulin is in a healthy range.
What does a high Fasting Serum Insulin mean?
Your fasting insulin is elevated, which often signals insulin resistance — the body producing extra insulin to keep glucose normal. This is common before type 2 diabetes and is interpreted alongside glucose (and HOMA-IR).
What does a low Fasting Serum Insulin mean?
Your fasting insulin is low. In a non-diabetic this is usually not a concern; in diabetes it can reflect reduced insulin production.
Understand your whole report, not just one number
A single value rarely tells the full story — Fasting Serum Insulin is best read alongside the rest of your panel. Paste your values or upload your report and get a plain-English explanation of every marker, with the important results flagged.