IGF-1 Test
Reflects growth hormone activity. Naturally declines with age.
What is IGF-1?
Reflects growth hormone activity. Naturally declines with age.
IGF-1 Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18–30 | 116 – 358 ng/mL |
| age 31–50 | 94.0 – 252 ng/mL |
| age 51–70 | 81.0 – 225 ng/mL |
| age 71+ | 53.0 – 175 ng/mL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your IGF-1 result may mean
Can reflect excess growth hormone (e.g. pituitary adenoma). Used in evaluating acromegaly.
Can reflect growth hormone deficiency, malnutrition, or chronic illness.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Related Hormones biomarkers
Markers commonly tested alongside IGF-1.
Frequently asked
No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.
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