Growth Hormone Level Test
Growth Hormone Level Test can be requested without a referral, and this overview covers what to expect. A growth hormone (GH) level test measures the amount of growth hormone in your blood. It is ordered to evaluate symptoms of GH excess or deficiency, such as abnormal growth, unexplained weight changes, or fatigue. Because GH is released in pulses, results are often interpreted with other tests.
- Sample type
- blood
- Category
- Hormone
- Turnaround
- 1-3 business days
- Price
- $158
- Referral
- Not required
A growth hormone (GH) level test measures the amount of growth hormone in your blood. It is ordered to evaluate symptoms of GH excess or deficiency, such as abnormal growth, unexplained weight changes, or fatigue. Because GH is released in pulses, results are often interpreted with other tests.
What it measures
- Growth hormone — The main hormone measured; levels fluctuate throughout the day.
- IGF-1 — A hormone made in response to GH; often checked alongside GH for a clearer picture.
- Glucose — Blood sugar may be measured during a suppression test to see if GH drops as expected.
- Other pituitary hormones — Sometimes checked to see if other hormone-producing glands are affected.
Who it is for
A doctor may order this test if you have symptoms of too much or too little growth hormone, such as unusual growth, vision changes, or persistent fatigue. It is also used to monitor known pituitary conditions.
Preparation
Preparation depends on the specific test: some require fasting for 8–12 hours, while others need you to avoid strenuous exercise or certain medications beforehand. If no special preparation is needed, your doctor will tell you.
Results and what they mean
Results are usually reported as a number with a reference range, but normal ranges vary by age, sex, and testing method. A clinician interprets your results along with your symptoms and other tests. This is general information, not medical advice; discuss your results with a healthcare professional.
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 growth hormone level 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 for this test?
It depends on the specific protocol. Some GH tests require fasting, while others do not. Follow your doctor's instructions.
Why does my GH level fluctuate?
Growth hormone is released in bursts, especially during sleep, so a single random level can be hard to interpret. Your doctor may order a stimulation or suppression test for clarity.
How long until I get results?
Typical turnaround is 1–3 business days, but it may be longer if special handling or additional tests are needed.
Can I take my medications before the test?
Some medications can affect GH levels. Ask your doctor whether to take them as usual or skip them before the test.