An IGF-1 (Insulin-Like Growth Factor 1) test measures the level of IGF-1, a hormone that reflects growth hormone activity in your body. Unlike growth hormone itself, which fluctuates throughout the day, IGF-1 levels remain relatively stable.
What This Test Measures
IGF-1 (Insulin-Like Growth Factor 1):
IGF-1 is produced primarily by the liver in response to growth hormone (GH) stimulation from the pituitary gland. It mediates many of growth hormone’s effects on tissues throughout the body.
Reference Ranges
IGF-1 levels vary significantly by age, declining after puberty:
• Levels are highest during puberty and young adulthood
• Gradually decline with age
• Reference ranges are age and sex-specific
Your results should be interpreted by a healthcare provider using age-appropriate ranges.
Who Should Consider This Test
• Adults investigating symptoms of growth hormone deficiency:
– Decreased energy and vitality
– Increased body fat, especially abdominal
– Decreased muscle mass and strength
– Reduced bone density
– Impaired psychological well-being
• Those taking growth hormone or peptide therapies (to monitor effectiveness)
• People interested in anti-aging hormone assessment
• Evaluation of pituitary gland function
• Investigation of acromegaly (excess growth hormone)
Why IGF-1 Instead of Growth Hormone?
Growth hormone is secreted in pulses and levels change rapidly throughout the day. A single GH measurement is unreliable. IGF-1 provides a stable reflection of overall GH activity over time, making it the preferred screening test.
How It Works
1. Order your test online – no doctor visit required
2. Visit any Quest Diagnostics location nationwide
3. Simple blood draw takes approximately 5 minutes
4. Results delivered to your secure portal within 1-2 business days
Preparation
No fasting required, though some providers recommend fasting for consistency.
Related Tests to Consider
• IGF-BP3 – Binding protein that affects IGF-1 activity
• Comprehensive Metabolic Panel – Overall metabolic health
• Testosterone – Often evaluated alongside IGF-1
Why Choose Wittmer Rejuvenation Clinic
At $30.75, our IGF-1 test is competitively priced. As a hormone optimization clinic, we understand the role of growth hormone and IGF-1 in vitality and well-being. We partner with Quest Diagnostics for reliable, CLIA-certified laboratory testing with convenient locations across all 50 states.
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