METABOLIC
Insulin-Like Growth Factor 1
Also known as IGF-1
What it is
IGF-1 is produced by the liver in response to growth hormone. It reflects growth hormone activity and is more stable to measure than growth hormone itself.
Why it matters
IGF-1 is a safety marker for any growth-hormone-related peptide therapy (like sermorelin). Very low or very high values need attention.
Range GPLX watches for
GPLX watches for IGF-1 in age-appropriate reference ranges. Values persistently above the upper limit warrant a hold on growth-signaling peptides.
This educational range is not a personal diagnostic threshold. Your physician interprets your result in context of your full biomarker panel, medications, symptoms, and history.
What abnormal values can suggest
If low
A low IGF-1 value can suggest growth hormone deficiency, malnutrition, or chronic illness.
If high
A high IGF-1 value can suggest exogenous growth hormone use, acromegaly, or peptide overexposure.
This marker is reviewed when clinically appropriate as part of physician-directed labs. Membership is $39.99/month; consultation is $30.
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