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Hormones

IGF-1 Test

IGF-1 is an important growth factor that reflects your body's repair and regeneration capacity. As part of a comprehensive health assessment, monitoring IGF-1 can help identify potential areas for proactive wellness support.

Doctor's Assessment Included

Reference Ranges

See the value that applies to you:

Choose male or female — this range differs by sex.

Enter your age — this range changes with age.

This range also depends on context such as cycle phase or sample material; the highlighted rows apply to your group.

Male Your group
nmol/l
Low 13 Normal 50 High
Female Your group
nmol/l
Low 13 Normal 50 High

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.

Check your own value

IGF-1 (Insulin-like Growth Factor): what this test measures

This test measures the concentration of IGF-1 in your blood. IGF-1 is produced primarily in the liver in response to growth hormone stimulation and mediates many of the growth-promoting effects of growth hormone throughout the body.

IGF-1 (Insulin-like Growth Factor): why this value matters

Monitoring IGF-1 supports a proactive approach to health by providing insight into growth hormone function, metabolic activity, and tissue maintenance. This information can guide conversations with your healthcare provider.

IGF-1 (Insulin-like Growth Factor): when is testing worthwhile?

Testing may be recommended if you experience unexplained changes in body composition, fatigue, or reduced bone density. Your healthcare provider may also suggest testing if a growth hormone disorder is suspected.

IGF-1 (Insulin-like Growth Factor): symptoms of a high or low value

Low Levels

Some people may experience fatigue, decreased muscle mass, increased body fat, reduced bone density, or impaired recovery from exercise when IGF-1 levels are low.

High Levels

Elevated IGF-1 levels may be associated with joint pain, swelling, enlarged features, or changes in skin texture. Very high levels could suggest excessive growth hormone production.

IGF-1 (Insulin-like Growth Factor): what to do about an abnormal value

Male

If Low

Low IGF-1 may indicate growth hormone deficiency. Consider endocrine evaluation.

If High

Elevated IGF-1 may indicate acromegaly. Consider pituitary MRI and consultation with an endocrinologist.

Female

If Low

Low IGF-1 may indicate growth hormone deficiency. Consider endocrine evaluation.

If High

Elevated IGF-1 may indicate acromegaly. Consider pituitary MRI and consultation with an endocrinologist.

IGF-1 (Insulin-like Growth Factor): lifestyle and this value

Adequate sleep, regular physical activity, and balanced nutrition may support healthy IGF-1 levels. Strength training and sufficient protein intake are often associated with optimal growth factor activity. Consult your healthcare provider for personalized guidance.

IGF-1 (Insulin-like Growth Factor): frequently asked questions

What is the difference between IGF-1 and growth hormone?
Growth hormone stimulates IGF-1 production in the liver. IGF-1 levels remain more stable throughout the day, making it a more reliable marker of growth hormone activity.
Can lifestyle changes affect IGF-1 levels?
Yes, regular exercise, adequate sleep, and balanced nutrition may help support healthy IGF-1 levels. Consult your healthcare provider for advice.
Why might my doctor test IGF-1?
Your doctor may test IGF-1 to evaluate growth hormone function, investigate unexplained fatigue or body composition changes, or monitor a known pituitary condition.

Test Products

This marker is included in the following test panels.

Whoop

Whoop Performance Health

A 50-biomarker performance panel inspired by the WHOOP Performance Health Panel — recovery, blood production, thyroid, hormones, iron and nutrient status for people who train.

Complete Blood Count (CBC) Leukocyte Differential ALP (Alkaline Phosphatase) ALT (Alanine Aminotransferase) AST (Aspartate Aminotransferase) Albumin Total Protein Bilirubin (Total) ApoB (Apolipoprotein B) Total Cholesterol LDL Cholesterol HDL Cholesterol Triglycerides Lipoprotein(a) Urea (BUN) Creatinine eGFR (Estimated Glomerular Filtration Rate) Calcium Bicarbonate Chloride Sodium Potassium Magnesium Cortisol DHEA-S Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) SHBG (Sex Hormone Binding Globulin) Total Testosterone Free Testosterone TSH (Thyroid Stimulating Hormone) Glucose (Fasting) HbA1c (Glycated Hemoglobin) Insulin (Fasting) HOMA-IR CRP (C-Reactive Protein) Homocysteine Ferritin Iron (Serum) Transferrin Transferrin Saturation Vitamin D (25-OH) IGF-1 (Insulin-like Growth Factor) Creatine Kinase (CK) Reticulocytes Free T3 (Triiodothyronine) Free T4 (Thyroxine) Vitamin B12 Folate (Folic Acid)
€689,-

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Medical standards

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

Medical policy
CIBG Ministerie van Volksgezondheid,
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IGF-1 (Insulin-like Growth Factor)

€114,-