Longevity system

IGF-1 Longevity Z-Score

IGF-1 Z-Score

IGF-1 standardized for age and sex — a longevity-context score.

What is it

IGF-1 Longevity Z-Score — in plain English.

The IGF-1 Z-score standardizes IGF-1 for age and sex, providing a more interpretable longevity-context value.

Why it's measured

What IGF-1 Z-Score can reveal.

IGF-1 has been studied extensively in longevity research, with complex relationships between levels and aging signals.

Reference range

Where most laboratories draw the standard line.

Standard laboratory reference

Z-score, age- and sex-adjusted standardized

Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.

What results may indicate

Higher vs. lower IGF-1 Z-Score — at a high level.

Elevated

Very high values warrant clinical evaluation; longevity interpretation is nuanced.

Lower

Has been associated with GH deficiency in research literature.

These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.

When it's measured

When IGF-1 Z-Score is typically run.

Calculated when IGF-1 is measured.

Related markers

Often measured alongside IGF-1 Z-Score.

Biological Age (composite)Longevity systemGlycanAge IndexLongevity systemAllostatic Load IndexLongevity systemUric Acid (longevity context)Longevity systemNLR (Neutrophil : Lymphocyte Ratio)Longevity systemGlycemic Variability CompositeLongevity system

Measured in

IGF-1 Z-Score is one of 160 biomarkers in the Apex Panel.

A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.

Explore the Apex Panel →
160 biomarkers13 body systemsPhysician-reviewed
← Back to all biomarkers

This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.