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Insulin-Like Growth Factor 1 (IGF-1)
Hormones
Insulin-Like Growth Factor 1 (IGF-1)
Also known as: IGF-I, Somatomedin C
COMMON RANGE
146 – 494
ng/mL
0
601
M
Mayo Clinic Laboratories
Adult Male
↗
See all sources ↓
CONVERT & COMPARE
ng/mL
=
41.8
nmol/L
=
320
µg/L
=
320
mcg/L
=
320
ug/L
Reference ranges across 10+ sources
Adult reference ranges from 63 entries across 4 named sources, shown in ng/mL. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
M
Mayo Clinic Laboratories
Male
18y–19y
146 – 494 ng/mL
↗
M
Mayo Clinic Laboratories
Male
19y–20y
140 – 463 ng/mL
↗
M
Mayo Clinic Laboratories
Male
20y–21y
133 – 430 ng/mL
↗
M
Mayo Clinic Laboratories
Male
21y–26y
115 – 355 ng/mL
↗
M
Mayo Clinic Laboratories
Male
26y–31y
97.9 – 282 ng/mL
↗
M
Mayo Clinic Laboratories
Male
31y–36y
88.3 – 246 ng/mL
↗
M
Mayo Clinic Laboratories
Male
36y–41y
83.4 – 233 ng/mL
↗
M
Mayo Clinic Laboratories
Male
41y–46y
74.9 – 216 ng/mL
↗
M
Mayo Clinic Laboratories
Male
46y–51y
66.9 – 205 ng/mL
↗
M
Mayo Clinic Laboratories
Male
51y–56y
60.6 – 200 ng/mL
↗
M
Mayo Clinic Laboratories
Male
56y–61y
54.3 – 194 ng/mL
↗
M
Mayo Clinic Laboratories
Male
61y–66y
48.8 – 188 ng/mL
↗
M
Mayo Clinic Laboratories
Male
66y–71y
46.5 – 192 ng/mL
↗
M
Mayo Clinic Laboratories
Male
71y–76y
40.9 – 179 ng/mL
↗
M
Mayo Clinic Laboratories
Male
76y–81y
37.1 – 172 ng/mL
↗
M
Mayo Clinic Laboratories
Male
81y–86y
33.8 – 165 ng/mL
↗
M
Mayo Clinic Laboratories
Male
≥86y
32.2 – 166 ng/mL
↗
M
Mayo Clinic Laboratories
Female
18y–19y
121 – 486 ng/mL
↗
M
Mayo Clinic Laboratories
Female
19y–20y
114 – 451 ng/mL
↗
M
Mayo Clinic Laboratories
Female
20y–21y
108 – 416 ng/mL
↗
M
Mayo Clinic Laboratories
Female
21y–26y
92.9 – 342 ng/mL
↗
M
Mayo Clinic Laboratories
Female
26y–31y
78.4 – 270 ng/mL
↗
M
Mayo Clinic Laboratories
Female
31y–36y
73.1 – 243 ng/mL
↗
M
Mayo Clinic Laboratories
Female
36y–41y
69 – 227 ng/mL
↗
M
Mayo Clinic Laboratories
Female
41y–46y
61.5 – 204 ng/mL
↗
M
Mayo Clinic Laboratories
Female
46y–51y
56.8 – 195 ng/mL
↗
M
Mayo Clinic Laboratories
Female
51y–56y
53 – 190 ng/mL
↗
M
Mayo Clinic Laboratories
Female
56y–61y
45.6 – 172 ng/mL
↗
M
Mayo Clinic Laboratories
Female
61y–66y
42.2 – 169 ng/mL
↗
M
Mayo Clinic Laboratories
Female
66y–71y
38.3 – 163 ng/mL
↗
M
Mayo Clinic Laboratories
Female
71y–76y
36.6 – 165 ng/mL
↗
M
Mayo Clinic Laboratories
Female
76y–81y
34.7 – 165 ng/mL
↗
M
Mayo Clinic Laboratories
Female
81y–86y
34.4 – 172 ng/mL
↗
M
Mayo Clinic Laboratories
Female
≥86y
33.6 – 178 ng/mL
↗
L
Labcorp
Male
19y–21y
281 – 510 ng/mL
↗
L
Labcorp
Male
21y–31y
155 – 432 ng/mL
↗
L
Labcorp
Male
31y–41y
132 – 333 ng/mL
↗
L
Labcorp
Male
41y–51y
121 – 237 ng/mL
↗
L
Labcorp
Male
51y–61y
68 – 245 ng/mL
↗
L
Labcorp
Male
61y–71y
60 – 220 ng/mL
↗
L
Labcorp
Male
71y–81y
36 – 215 ng/mL
↗
L
Labcorp
Female
19y–21y
217 – 475 ng/mL
↗
L
Labcorp
Female
21y–31y
87 – 368 ng/mL
↗
L
Labcorp
Female
31y–41y
106 – 368 ng/mL
↗
L
Labcorp
Female
41y–51y
118 – 298 ng/mL
↗
L
Labcorp
Female
51y–61y
53 – 287 ng/mL
↗
L
Labcorp
Female
61y–71y
75 – 263 ng/mL
↗
L
Labcorp
Female
71y–81y
54 – 205 ng/mL
↗
Q
Quest Diagnostics
All
≥18y
34 – 548 ng/mL
↗
A
ARUP Laboratories
Male
18y–30y
84 – 461 ng/mL
↗
A
ARUP Laboratories
Male
30y–40y
78 – 246 ng/mL
↗
A
ARUP Laboratories
Male
40y–50y
67 – 237 ng/mL
↗
A
ARUP Laboratories
Male
50y–60y
53 – 225 ng/mL
↗
A
ARUP Laboratories
Male
60y–70y
29 – 246 ng/mL
↗
A
ARUP Laboratories
Male
70y–80y
19 – 246 ng/mL
↗
A
ARUP Laboratories
Male
≥80y
15 – 184 ng/mL
↗
A
ARUP Laboratories
Female
18y–30y
91 – 436 ng/mL
↗
A
ARUP Laboratories
Female
30y–40y
78 – 290 ng/mL
↗
A
ARUP Laboratories
Female
40y–50y
57 – 271 ng/mL
↗
A
ARUP Laboratories
Female
50y–60y
43 – 238 ng/mL
↗
A
ARUP Laboratories
Female
60y–70y
26 – 244 ng/mL
↗
A
ARUP Laboratories
Female
70y–80y
17 – 226 ng/mL
↗
A
ARUP Laboratories
Female
≥80y
17 – 200 ng/mL
↗
M
Mayo Clinic Laboratories
Male · 18y–19y
↗
146 – 494 ng/mL
M
Mayo Clinic Laboratories
Male · 19y–20y
↗
140 – 463 ng/mL
M
Mayo Clinic Laboratories
Male · 20y–21y
↗
133 – 430 ng/mL
M
Mayo Clinic Laboratories
Male · 21y–26y
↗
115 – 355 ng/mL
M
Mayo Clinic Laboratories
Male · 26y–31y
↗
97.9 – 282 ng/mL
M
Mayo Clinic Laboratories
Male · 31y–36y
↗
88.3 – 246 ng/mL
M
Mayo Clinic Laboratories
Male · 36y–41y
↗
83.4 – 233 ng/mL
M
Mayo Clinic Laboratories
Male · 41y–46y
↗
74.9 – 216 ng/mL
M
Mayo Clinic Laboratories
Male · 46y–51y
↗
66.9 – 205 ng/mL
M
Mayo Clinic Laboratories
Male · 51y–56y
↗
60.6 – 200 ng/mL
M
Mayo Clinic Laboratories
Male · 56y–61y
↗
54.3 – 194 ng/mL
M
Mayo Clinic Laboratories
Male · 61y–66y
↗
48.8 – 188 ng/mL
M
Mayo Clinic Laboratories
Male · 66y–71y
↗
46.5 – 192 ng/mL
M
Mayo Clinic Laboratories
Male · 71y–76y
↗
40.9 – 179 ng/mL
M
Mayo Clinic Laboratories
Male · 76y–81y
↗
37.1 – 172 ng/mL
M
Mayo Clinic Laboratories
Male · 81y–86y
↗
33.8 – 165 ng/mL
M
Mayo Clinic Laboratories
Male · ≥86y
↗
32.2 – 166 ng/mL
M
Mayo Clinic Laboratories
Female · 18y–19y
↗
121 – 486 ng/mL
M
Mayo Clinic Laboratories
Female · 19y–20y
↗
114 – 451 ng/mL
M
Mayo Clinic Laboratories
Female · 20y–21y
↗
108 – 416 ng/mL
M
Mayo Clinic Laboratories
Female · 21y–26y
↗
92.9 – 342 ng/mL
M
Mayo Clinic Laboratories
Female · 26y–31y
↗
78.4 – 270 ng/mL
M
Mayo Clinic Laboratories
Female · 31y–36y
↗
73.1 – 243 ng/mL
M
Mayo Clinic Laboratories
Female · 36y–41y
↗
69 – 227 ng/mL
M
Mayo Clinic Laboratories
Female · 41y–46y
↗
61.5 – 204 ng/mL
M
Mayo Clinic Laboratories
Female · 46y–51y
↗
56.8 – 195 ng/mL
M
Mayo Clinic Laboratories
Female · 51y–56y
↗
53 – 190 ng/mL
M
Mayo Clinic Laboratories
Female · 56y–61y
↗
45.6 – 172 ng/mL
M
Mayo Clinic Laboratories
Female · 61y–66y
↗
42.2 – 169 ng/mL
M
Mayo Clinic Laboratories
Female · 66y–71y
↗
38.3 – 163 ng/mL
M
Mayo Clinic Laboratories
Female · 71y–76y
↗
36.6 – 165 ng/mL
M
Mayo Clinic Laboratories
Female · 76y–81y
↗
34.7 – 165 ng/mL
M
Mayo Clinic Laboratories
Female · 81y–86y
↗
34.4 – 172 ng/mL
M
Mayo Clinic Laboratories
Female · ≥86y
↗
33.6 – 178 ng/mL
L
Labcorp
Male · 19y–21y
↗
281 – 510 ng/mL
L
Labcorp
Male · 21y–31y
↗
155 – 432 ng/mL
L
Labcorp
Male · 31y–41y
↗
132 – 333 ng/mL
L
Labcorp
Male · 41y–51y
↗
121 – 237 ng/mL
L
Labcorp
Male · 51y–61y
↗
68 – 245 ng/mL
L
Labcorp
Male · 61y–71y
↗
60 – 220 ng/mL
L
Labcorp
Male · 71y–81y
↗
36 – 215 ng/mL
L
Labcorp
Female · 19y–21y
↗
217 – 475 ng/mL
L
Labcorp
Female · 21y–31y
↗
87 – 368 ng/mL
L
Labcorp
Female · 31y–41y
↗
106 – 368 ng/mL
L
Labcorp
Female · 41y–51y
↗
118 – 298 ng/mL
L
Labcorp
Female · 51y–61y
↗
53 – 287 ng/mL
L
Labcorp
Female · 61y–71y
↗
75 – 263 ng/mL
L
Labcorp
Female · 71y–81y
↗
54 – 205 ng/mL
Q
Quest Diagnostics
All · ≥18y
↗
34 – 548 ng/mL
A
ARUP Laboratories
Male · 18y–30y
↗
84 – 461 ng/mL
A
ARUP Laboratories
Male · 30y–40y
↗
78 – 246 ng/mL
A
ARUP Laboratories
Male · 40y–50y
↗
67 – 237 ng/mL
A
ARUP Laboratories
Male · 50y–60y
↗
53 – 225 ng/mL
A
ARUP Laboratories
Male · 60y–70y
↗
29 – 246 ng/mL
A
ARUP Laboratories
Male · 70y–80y
↗
19 – 246 ng/mL
A
ARUP Laboratories
Male · ≥80y
↗
15 – 184 ng/mL
A
ARUP Laboratories
Female · 18y–30y
↗
91 – 436 ng/mL
A
ARUP Laboratories
Female · 30y–40y
↗
78 – 290 ng/mL
A
ARUP Laboratories
Female · 40y–50y
↗
57 – 271 ng/mL
A
ARUP Laboratories
Female · 50y–60y
↗
43 – 238 ng/mL
A
ARUP Laboratories
Female · 60y–70y
↗
26 – 244 ng/mL
A
ARUP Laboratories
Female · 70y–80y
↗
17 – 226 ng/mL
A
ARUP Laboratories
Female · ≥80y
↗
17 – 200 ng/mL
About Insulin-Like Growth Factor 1 (IGF-1)
This test measures the amount of IGF-1 (insulin-like growth factor 1) in your blood. IGF-1 is a hormone, a chemical messenger in your bloodstream that controls the actions of certain cells or organs.
IGF-1 manages the effects of growth hormone (GH) in your body. Together, IGF-1 and GH promote normal growth of bones and tissues.
GH levels in the blood change throughout the day, depending on your diet and activity levels. But IGF-1 levels are more stable. So an IGF-1 test is often a good measure of the average amount of GH being produced by the body.
Main source: MedlinePlus ↗
Useful for
Help diagnose GH deficiency
Help diagnose GH insensitivity, also known as Laron syndrome
Help diagnose gigantism in children
Help diagnose acromegaly in adults
Monitor treatment for a GH disorder
Main source: MedlinePlus ↗
Interpretation
If your child's results show lower than normal levels of IGF-1, it probably means they have a GH deficiency or insensitivity to GH.
Higher than normal levels of IGF-1 may mean gigantism in children or acromegaly in adults.
For general wellness information only. Talk to a clinician about your specific results.
Main source: MedlinePlus ↗
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Related biomarkers
Often tested alongside insulin-like growth factor 1 (igf-1) or part of the same panel.
Thyroid Stimulating Hormone (TSH)
Hormones
Free T4 (Thyroxine)
Hormones
Free T3 (Triiodothyronine)
Hormones
Total T4 (Thyroxine)
Hormones
Total T3 (Triiodothyronine)
Hormones
Reverse T3 (rT3)
Hormones
Sources
M
Mayo Clinic Laboratories
L
Labcorp
Q
Quest Diagnostics
A
ARUP Laboratories
Last updated 2026-05-02
This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
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