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Hormones

IGF-BP3 Test

IGF-BP3 regulates the availability of IGF-1, a key growth factor for tissue repair and training adaptation. For active individuals, monitoring IGF-BP3 helps paint a complete picture of your body's recovery and growth mechanisms.

Doctor's Assessment Included

Reference Ranges

No established reference range

There is no international reference preparation for IGF-BP3, so assays differ by roughly 24% and reference values are not transferable between laboratories. The Netherlands has no national reference interval and no external quality control for it, and the LUMC declines to publish a table. The value is also strongly age- and sex-dependent.

Unit: nmol/l

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

IGF-BP3: what this test measures

This test measures the concentration of IGF-BP3 in your blood. IGF-BP3 is the most abundant IGF binding protein and regulates the availability and activity of IGF-1 by transporting it through the bloodstream and controlling its release to tissues.

IGF-BP3: why this value matters

Understanding IGF-BP3 alongside IGF-1 can help active individuals optimize recovery protocols and nutrition strategies. The balance between these markers may influence how effectively your body repairs and adapts to training stress.

IGF-BP3: when is testing worthwhile?

Testing may be recommended alongside IGF-1 when evaluating suspected growth hormone disorders, monitoring pituitary function, or assessing nutritional status. Your healthcare provider can advise on appropriate timing.

IGF-BP3: symptoms of a high or low value

Low Levels

Some people with low IGF-BP3 may experience symptoms similar to growth hormone deficiency, such as fatigue, reduced muscle mass, or poor recovery. Low levels may also be associated with liver or nutritional issues.

High Levels

Elevated IGF-BP3 levels are less commonly associated with specific symptoms but may indicate excessive growth hormone production or other conditions. Consult your healthcare provider for interpretation of results.

IGF-BP3: lifestyle and this value

Maintaining balanced nutrition, adequate protein intake, and regular physical activity may support healthy IGF-BP3 levels. Good sleep hygiene is also important, as growth hormone is primarily released during deep sleep.

IGF-BP3: frequently asked questions

Why is IGF-BP3 tested alongside IGF-1?
IGF-BP3 carries most of the IGF-1 in your blood. Testing both together gives a more complete view of growth hormone activity and helps your healthcare provider interpret results more accurately.
What can cause low IGF-BP3 levels?
Low levels may be associated with growth hormone deficiency, liver disease, malnutrition, or certain chronic conditions. Your healthcare provider can determine the underlying cause.
Can I improve my IGF-BP3 levels naturally?
Balanced nutrition, regular exercise, and adequate sleep may support healthy IGF-BP3 production. Consult your healthcare provider for personalized recommendations.

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Medical reviewer

Medical standards

Dr. Naimi oversees the medical standards behind our content and assessments.

Medical policy
CIBG Ministerie van Volksgezondheid,
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IGF-BP3

€59,-