The growth hormone (GH) blood test measures levels of human growth hormone and IGF-1 (insulin-like growth factor 1) to screen for growth disorders and pituitary gland dysfunction. This lab test helps diagnose growth hormone deficiency in adults.
Growth hormone stimulates tissue growth, cell reproduction and regeneration. This test checks levels of GH and IGF-1 to evaluate the function of the pituitary gland, which produces GH.
Testing both GH and IGF-1 provides the most complete screening for possible growth hormone deficiency.
GH testing may be recommended for:
GH stimuation testing may also be done to confirm GH deficiency.
No special preparation is required. GH levels can fluctuate so blood may be drawn at multiple times during the day. Food intake and sleep can impact results. Your doctor may have you fast overnight prior to testing. Certain medications may also affect GH levels.
Normal ranges vary depending on age, sex and lab methods. Generally, normal results are:
An endocrinologist will interpret your GH and IGF-1 levels based on your symptoms and medical history. Further testing may be needed to confirm a growth hormone deficiency before starting treatment.
Our extensive lab network provides convenient access to growth hormone testing across the U.S. Order your test online and get same-day GH blood draw at one of 4,000+ locations. We work with top national labs like Quest Diagnostics and Labcorp to make testing convenient . Results delivered through our secure patient portal.
Estimated Turn Around For Results:
2-10 Business Days
For an exact turnaround time for results, please contact us at Personalabs and we will contact the lab on your behalf as turnaround times vary depending on testing location or lab testing provider.
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