{"id":"igf-1","name":"IGF-1 (Insulin-like Growth Factor 1)","shortName":"IGF-1","aliases":["IGF-1","Somatomedin C","Insulin-like Growth Factor 1","IGF-I","IGF-1, LC/MS","Insulin-Like Growth Factor I","IGF-1, Serum","IGF1","IGF 1","Insulin-Like Growth Factor 1, Serum","Insulin-Like Growth Factor 1 (IGF-1)","IGF-1, LCMS","Somatomedin-C","Sm-C"],"abbreviations":["IGF-1","IGF-I","IGF1","Sm-C"],"loinc":[{"code":"2484-4","primary":true},{"code":"29775-4","primary":false}],"specimen":"serum","units":[{"ucum":"ng/mL","display":"ng/mL"},{"ucum":"nmol/L","display":"nmol/L"}],"referenceRanges":[{"population":"Men, 18","low":145,"high":506,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). IGF-1 intervals depend on the assay. At age 18, Mayo's IDS-iSYS test (IGF1S, no longer orderable) listed 146.2–493.6 and ARUP lists 137–461 ng/mL. Mass spectrometry (LC-MS, run by Quest and also offered through Mayo as FIGF1) lists one adult interval for both sexes, for example 108–548 ng/mL at 18–19.9 years and 63–373 at 25–29.9 years; Quest notes LC-MS generally reads lower than electrochemiluminescence immunoassays.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"},{"title":"FIGF1: IGF-1, LC/MS","url":"https://www.mayocliniclabs.com/test-catalog/overview/75932","publisher":"Mayo Clinic Laboratories"},{"title":"IGF1S: Insulin-Like Growth Factor 1, Serum","url":"https://www.mayocliniclabs.com/test-catalog/overview/623571","publisher":"Mayo Clinic Laboratories"},{"title":"Insulin-Like Growth Factor 1 (IGF-1) with Calculated Z-Score (ARUP test 2007698)","url":"https://ltd.aruplab.com/Tests/Pub/2007698","publisher":"ARUP Laboratories"}]},{"population":"Women, 18","low":117,"high":430,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). IGF-1 intervals depend on the assay. At age 18, Mayo's IDS-iSYS test (IGF1S, no longer orderable) listed 120.5–485.8 and ARUP lists 117–436 ng/mL. Mass spectrometry (LC-MS, run by Quest and also offered through Mayo as FIGF1) lists one adult interval for both sexes, for example 108–548 ng/mL at 18–19.9 years and 63–373 at 25–29.9 years; Quest notes LC-MS generally reads lower than electrochemiluminescence immunoassays.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"},{"title":"FIGF1: IGF-1, LC/MS","url":"https://www.mayocliniclabs.com/test-catalog/overview/75932","publisher":"Mayo Clinic Laboratories"},{"title":"IGF1S: Insulin-Like Growth Factor 1, Serum","url":"https://www.mayocliniclabs.com/test-catalog/overview/623571","publisher":"Mayo Clinic Laboratories"},{"title":"Insulin-Like Growth Factor 1 (IGF-1) with Calculated Z-Score (ARUP test 2007698)","url":"https://ltd.aruplab.com/Tests/Pub/2007698","publisher":"ARUP Laboratories"}]},{"population":"Men, 19","low":122,"high":435,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 19","low":113,"high":408,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 20","low":116,"high":410,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 20","low":108,"high":384,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 21–25","low":109,"high":353,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 21–25","low":101,"high":347,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 26–30","low":101,"high":307,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 26–30","low":91,"high":308,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 31–35","low":95,"high":290,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 31–35","low":84,"high":281,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 36–40","low":90,"high":278,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 36–40","low":79,"high":259,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 41–45","low":84,"high":270,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 41–45","low":74,"high":239,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 46–50","low":81,"high":263,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 46–50","low":70,"high":225,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 51–55","low":74,"high":255,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 51–55","low":65,"high":216,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 56–60","low":68,"high":247,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 56–60","low":60,"high":207,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 61–65","low":64,"high":240,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 61–65","low":57,"high":202,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 66–70","low":59,"high":230,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 66–70","low":52,"high":196,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 71–75","low":53,"high":222,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 71–75","low":48,"high":191,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 76–80","low":45,"high":207,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 76–80","low":42,"high":185,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 81–85","low":40,"high":194,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 81–85","low":39,"high":177,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Men, 86–90","low":33,"high":176,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]},{"population":"Women, 86–90","low":34,"high":169,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp interval (IDS-iSYS immunoassay). Intervals are assay-specific, so use the range on your own report.","sources":[{"title":"Insulin-like Growth Factor 1 (IGF-1) (test 010363)","url":"https://www.labcorp.com/tests/010363/insulin-like-growth-factor-1-igf-1","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A protein your liver makes in response to growth hormone. It's a steady signal of growth hormone activity, and usual levels vary a lot with age and sex.","url":"https://bloodtesttracker.com/markers/igf-1","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}