Skip to content
FreeDoctor.org

Growth Hormone Tests Test

Growth hormone tests check if your body is making a normal amount of growth hormone (GH). They help detect GH deficiency, gigantism, or acromegaly.

What this test measures

Growth hormone (GH) tests are blood tests that check if your body is making a normal amount of GH. GH controls growth and metabolism. Levels are usually checked over several hours using tests that measure related substances.

What your results mean

Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.

Higher-than-normal results

If GH levels don't decrease during a suppression test, it may mean GH excess. In children, this could be gigantism; in adults, acromegaly. These are often caused by a pituitary tumor.

Lower-than-normal results

If GH levels don't increase during a stimulation test, it may mean GH deficiency. In children, this can cause slow growth and short stature. In adults, it can lead to low bone density and reduced muscle mass.

Frequently asked questions

What is growth hormone (GH)?

GH, also known as human growth hormone, controls your body's growth and helps control metabolism. It is made in the pituitary gland.

Why are multiple blood tests needed for GH?

GH levels change throughout the day depending on diet and activity. A single test isn't helpful, so tests are taken over a few hours to measure related substances.

What does a low GH level mean?

If GH levels don't increase during a stimulation test, it may mean GH deficiency. In children, this can cause slow growth; in adults, low bone density and reduced muscle mass.

What does a high GH level mean?

If GH levels don't decrease during a suppression test, it may mean GH excess. In children, this could be gigantism; in adults, acromegaly.

How are GH disorders treated?

GH deficiency may be treated with GH supplementation (injected medicine). Gigantism and acromegaly are often caused by a pituitary tumor and may be treated with radiation, surgery, or medicine.

Related lab tests

Sources

Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.