Hormone panel
IGF-1
Also called Insulin-like growth factor 1 · measured in ng/mL
What it measures
A growth factor produced largely by the liver in response to growth hormone.
Why it is tracked
The practical marker of growth-hormone axis activity, since growth hormone itself is released in pulses and is difficult to measure meaningfully. Baseline and follow-up IGF-1 are relevant to any growth-axis protocol.
What a provider considers
- Interpreted against age-specific ranges
- Relevant to any peptide protocol acting on the growth axis
- Both high and low values warrant attention
Reference ranges vary between laboratories and a single result rarely means much on its own. Interpretation depends on your symptoms, your other markers and the trend over time — which is what your provider reviews.