IGF-1 Insulin Blood Test
This page explains the igf-1 insulin blood test, what it measures, and how to arrange it. An IGF-1 (insulin-like growth factor 1) blood test measures a hormone that reflects growth hormone activity in the body. It is usually ordered to evaluate growth problems, suspected growth hormone excess or deficiency, or to monitor related treatment.
- Sample type
- blood
- Category
- Hormone
- Turnaround
- 1-3 business days
- Price
- $129
- Referral
- Not required
An IGF-1 (insulin-like growth factor 1) blood test measures a hormone that reflects growth hormone activity in the body. It is usually ordered to evaluate growth problems, suspected growth hormone excess or deficiency, or to monitor related treatment.
What it measures
- IGF-1 (insulin-like growth factor 1) — The main hormone measured; it mirrors average growth hormone levels over recent days.
- Growth hormone (sometimes) — May be checked alongside IGF-1, though it fluctuates widely through the day.
- IGFBP-3 (sometimes) — A binding protein that carries IGF-1; can help interpret results in some cases.
- Related hormone tests — Other hormones may be added by your clinician based on your symptoms.
Who it is for
A clinician such as an endocrinologist, pediatrician, or primary care provider typically orders this test when growth, pituitary, or hormone concerns are being evaluated.
Preparation
Often no fasting is required, but some laboratories prefer a morning sample. Follow the specific instructions from your clinician or lab.
Results and what they mean
Results are reported as a number compared with a reference range for your age and sex. A clinician interprets the value alongside your symptoms and other tests; it is not a diagnosis on its own. This is general information, not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the igf-1 insulin blood test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Do I need to fast?
Usually not, but your lab may ask for a morning draw. Check your instructions.
How soon will I get results?
Typical turnaround is 1 to 3 business days, though it can vary by lab.
Can I take my medications?
Ask your clinician, since some medicines and conditions can affect IGF-1 levels.
Is one test enough?
Sometimes repeat or additional tests are needed; your clinician will decide.