**Note: All laboratory testing requires an authorizing physician. DHA Laboratory offers a patient direct program that partners you with an authorizing physician. If you have any additional questions regarding the availability of testing, please contact our laboratory by telephone or email.**
This test measures the amount of IGF-1 (insulin-like growth factor 1) in your blood. IGF-1 is a hormone that manages the effects of growth hormone (GH) in your body. Together, IGF-1 and GH promote normal growth of bones and tissues. GH levels in the blood fluctuate throughout the day depending on your diet and activity levels. But IGF-1 levels remain stable. So, an IGF-1 test is a useful way to find out if your body is making a normal amount of GH.
Patient Preparation: Discontinue any supplements containing Biotin for 72 hours prior to specimen collection.