IGF-1
Reads: Growth factor
You want it up: IGF-1 sustains the hair growth phase, and androgens work partly by suppressing it.
What this marker reads
Insulin-like growth factor-1 — the dermal-papilla growth factor that drives follicle proliferation and prolongs anagen (the active growth phase).
What a named body publishes
Each line below is the sentence the issuing body wrote, carried with its own identifier. Nothing here interprets your result — it states what was published, for whom, and by whom.
IGF-1
“Table 2 gives, for males aged 20 years, 2.5th-97.5th percentile IGF-1 of 133.1-430.0 ng/mL (50th percentile 258.5 ng/mL).” males, 20
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 20 years, 2.5th-97.5th percentile IGF-1 of 107.8-416.0 ng/mL (50th percentile 234.8 ng/mL).” females, 20
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 21-25 years, 2.5th-97.5th percentile IGF-1 of 115.2-354.8 ng/mL (50th percentile 217.2 ng/mL).” males, 21-25
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 21-25 years, 2.5th-97.5th percentile IGF-1 of 92.9-342.0 ng/mL (50th percentile 196.2 ng/mL).” females, 21-25
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 26-30 years, 2.5th-97.5th percentile IGF-1 of 97.9-281.6 ng/mL (50th percentile 176.8 ng/mL).” males, 26-30
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 26-30 years, 2.5th-97.5th percentile IGF-1 of 78.4-270.0 ng/mL (50th percentile 158.7 ng/mL).” females, 26-30
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 31-35 years, 2.5th-97.5th percentile IGF-1 of 88.3-246.0 ng/mL (50th percentile 156.4 ng/mL).” males, 31-35
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 31-35 years, 2.5th-97.5th percentile IGF-1 of 73.1-243.0 ng/mL (50th percentile 144.7 ng/mL).” females, 31-35
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 36-40 years, 2.5th-97.5th percentile IGF-1 of 83.4-232.7 ng/mL (50th percentile 147.9 ng/mL).” males, 36-40
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 36-40 years, 2.5th-97.5th percentile IGF-1 of 69.0-227.0 ng/mL (50th percentile 135.7 ng/mL).” females, 36-40
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 41-45 years, 2.5th-97.5th percentile IGF-1 of 74.9-216.4 ng/mL (50th percentile 135.7 ng/mL).” males, 41-45
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 41-45 years, 2.5th-97.5th percentile IGF-1 of 61.5-204.4 ng/mL (50th percentile 121.7 ng/mL).” females, 41-45
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 46-50 years, 2.5th-97.5th percentile IGF-1 of 66.9-205.1 ng/mL (50th percentile 125.7 ng/mL).” males, 46-50
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 46-50 years, 2.5th-97.5th percentile IGF-1 of 56.8-194.5 ng/mL (50th percentile 114.5 ng/mL).” females, 46-50
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 51-55 years, 2.5th-97.5th percentile IGF-1 of 60.6-200.3 ng/mL (50th percentile 119.4 ng/mL).” males, 51-55
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 51-55 years, 2.5th-97.5th percentile IGF-1 of 53.0-189.6 ng/mL (50th percentile 109.9 ng/mL).” females, 51-55
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 56-60 years, 2.5th-97.5th percentile IGF-1 of 54.3-194.2 ng/mL (50th percentile 112.5 ng/mL).” males, 56-60
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 56-60 years, 2.5th-97.5th percentile IGF-1 of 45.6-172.4 ng/mL (50th percentile 98.0 ng/mL).” females, 56-60
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 61-65 years, 2.5th-97.5th percentile IGF-1 of 48.8-187.7 ng/mL (50th percentile 106.0 ng/mL).” males, 61-65
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 61-65 years, 2.5th-97.5th percentile IGF-1 of 42.2-169.0 ng/mL (50th percentile 94.1 ng/mL).” females, 61-65
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 66-70 years, 2.5th-97.5th percentile IGF-1 of 46.5-191.9 ng/mL (50th percentile 105.8 ng/mL).” males, 66-70
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 66-70 years, 2.5th-97.5th percentile IGF-1 of 38.3-162.5 ng/mL (50th percentile 88.7 ng/mL).” females, 66-70
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 71-75 years, 2.5th-97.5th percentile IGF-1 of 40.9-179.2 ng/mL (50th percentile 96.7 ng/mL).” males, 71-75
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 71-75 years, 2.5th-97.5th percentile IGF-1 of 36.6-164.7 ng/mL (50th percentile 88.2 ng/mL).” females, 71-75
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 76-80 years, 2.5th-97.5th percentile IGF-1 of 37.1-172.0 ng/mL (50th percentile 91.1 ng/mL).” males, 76-80
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 76-80 years, 2.5th-97.5th percentile IGF-1 of 34.7-164.8 ng/mL (50th percentile 86.7 ng/mL).” females, 76-80
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 81-85 years, 2.5th-97.5th percentile IGF-1 of 33.8-165.4 ng/mL (50th percentile 86.1 ng/mL).” males, 81-85
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 81-85 years, 2.5th-97.5th percentile IGF-1 of 34.4-172.4 ng/mL (50th percentile 89.1 ng/mL).” females, 81-85
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for males aged 86-90 years, 2.5th-97.5th percentile IGF-1 of 32.2-166.1 ng/mL (50th percentile 85.0 ng/mL).” males, 86-90
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
“Table 2 gives, for females aged 86-90 years, 2.5th-97.5th percentile IGF-1 of 33.6-177.8 ng/mL (50th percentile 90.3 ng/mL).” females, 86-90
Reference Intervals for Insulin-like Growth Factor-1 (IGF-I) From Birth to Senescence: Results From a Multicenter Study Using a New Automated Chemiluminescence IGF-I Immunoassay Conforming to Recent International Recommendations · The Journal of Clinical Endocrinology & Metabolism · 2014 DOI 10.1210/jc.2013-3059 · PMID 24606072
Your laboratory reads your result against its own assay, and this page does not do that for it. What is above is what a named body published and for whom; the machinery this marker reads is set out on its pathway page, and the formulas witnessed on it are below.
The machinery behind it
What raises this marker and what it goes on to move — each edge carried with its own study — is set out in full on its pathway page: Growth factor →
Formulas that modulate it
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