IGF-1 (Insulin-like Growth Factor 1) Test
What is IGF-1 Test?
Insulin-like Growth Factor-1 (IGF-1) Test is a blood test used to measure the level of IGF-1 hormone in the body. IGF-1 or somatomedin C is a growth factor produced in response to the stimulation of growth hormone by the pituitary gland. It is mainly responsible for the normal growth rate of body’s cells, and is important in high metabolic activities like growth, tissue repair, muscle building, and bone development.
Why is IGF-1 Test Done?
Doctors may order IGF-1 test for the following reasons:
- To diagnose conditions such as growth hormone deficiency, hypopituitarism, and acromegaly
- To assess growth problems in children, such as growth delay, failure to thrive, and delayed puberty
- To monitor treatment involving growth hormone replacement
IGF-1 Test Preparation
No special preparation is required for IGF-1 test. However, your doctor may advise you to fast for several hours before the test to ensure more accurate results.
Procedure of IGF-1 Test
The procedure for IGF-1 test is an easy and painless one. It is performed by taking a sample of blood from a vein in the arm using a needle. After that the sample of blood is sent off to a laboratory for testing.
Types of IGF-1 Test
There are two types of IGF-1 test available. They are:
- Total IGF-1 Test: This test measures the total level of IGF-1 in the blood.
- Bioavailable IGF-1 Test: This test measures the amount of active IGF-1 that is free from binding with other proteins. This type of test is more accurate in measuring the level of IGF-1 in the body.
Risks of IGF-1 Test
IGF-1 test poses relatively little risks. There is a possibility of minor discomfort from the needle prick, and there may be some slight bleeding and bruising at the site of injection. rarely, infection may occur.
When and How Often is IGF-1 Test Done?
The IGF-1 test is usually performed when the doctor suspects certain conditions related to growth hormone production. The test may be done any time during the day, though it is more accurate if done after several hours of fasting. The frequency of the test may depend on the doctor's advice.
