Growth Hormone Stimulation Test

This is a blood test which is done because growth hormone levels are secreted in different amounts during the day. This means that the level of growth hormone varies and this test is done to show if there is a growth hormone deficiency. Sometimes stimulants such as those listed below are used to test the growth hormone response:

  • Insulin-induced hypoglycemia, in which the blood sugar level is lowered to less than 40 mg/dl

  • Vigorous exercise

  • Other drugs (arginine, glucagons, levodopa, and clonidine).

PREPARATION FOR TEST

No preparation or fasting is necessary.

NORMAL FINDINGS

Growth hormone levels greater than 10 ng/dl or greater than 10 μg/L (SI units)

Ranges for normal findings may vary among different laboratories and hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.

MEANING OF TEST

Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.

OBTAINING THE TEST RESULTS

It is your responsibility to obtain your test results. Ask the lab or department performing the test when and how you will get your results.