Getting Started
Indices
Inflammation
Bone and mineral
Glucose and insulin
Lipids
Nerve and blood vessel
Oxidative stress and fibrosis
Kidney and protein
Cartilage
FSI
Fasting serum insulin
High
28.8µIU·mL⁻¹Ref 2–20 µIU·mL⁻¹
Z +3.96↑ Bad
The card shows an example result of 28.8 µIU·mL⁻¹, which is 3.96 SD above the mean.
What it measures
The level of insulin in the blood after at least 8 hours without food. When the body resists insulin, the pancreas makes more to keep glucose normal.
Reference range
| Field | Value |
|---|---|
| Abbreviation | FSI |
| Group | Glucose and insulin |
| Unit | µIU·mL⁻¹ |
| Healthy range | 2–20 |
| Mean | 11 |
| SD | 4.5 |
| Direction | ↑ Bad — a raised value is the concern. |
The mean is (low + high) / 2 and the SD is (high − low) / 4, so the healthy range covers Z from −2 to +2.
Reading the result
- High — Points to insulin resistance, often before blood glucose rises.
- Low — Not a concern in this panel. Very low insulin with high glucose can point to diabetes and needs a doctor's review.
Notes
- Combine with fasting glucose to work out HOMA-IR, a measure of insulin resistance.
- Insulin assays vary between labs.
- This page is general information, not medical advice. Discuss results with a clinician.