Insulin-like Growth Factor 1 (IGF-1)
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Insulin-like Growth Factor 1 (IGF-1) changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Insulin-like Growth Factor 1 (IGF-1)?
A hormone made mainly by the liver in response to growth hormone, reflecting how much growth hormone your body makes over time.
IGF-1 is produced mostly by the liver after growth hormone stimulates it, so it gives a steadier picture of growth hormone activity than measuring growth hormone directly. Higher levels can be associated with excess growth hormone, as in acromegaly, while lower levels can be associated with growth hormone deficiency, poor nutrition or liver problems. Levels naturally change with age, so results are read against age and sex ranges alongside other pituitary tests.
What to know about Insulin-like Growth Factor 1 (IGF-1)
Understanding Insulin-like Growth Factor 1 (IGF-1) means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
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Official sources
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Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.