SHBG — What It Means in Your Blood Test
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This is a carrier protein that holds sex hormones and controls how much your body can use.
Your SHBG result shows how much of this carrier protein is present, shaping how freely sex hormones reach your tissues. It rarely stands alone, since it helps explain testosterone and estrogen figures.
Also known as: Sex hormone-binding globulin, Sex steroid-binding globulin, Testosterone-estrogen binding globulin, TEBG
This isn't a case where higher or lower is better. Your body keeps it in a narrow band, and both directions can matter.
Last reviewed: 2026-08-16
What does SHBG do in your body?
By gripping testosterone and estradiol, it decides how much stays in reserve and how much is free to fuel drive, mood, and muscle. Weight, thyroid, and liver all shift its level. A clinician uses it to explain why your feelings may not fit your total hormone numbers [Endocrine Society, 2018].
SHBG is the shuttle bus that holds sex hormones and controls how many get off at your tissues.
What is SHBG?
SHBG is a protein made mainly by the liver. It binds testosterone and estradiol, and this controls how much reaches your tissues.
Why is SHBG tested?
You may have this test to help make sense of testosterone and estrogen results. It helps most when your symptoms do not match the totals.
What is a normal SHBG range?
- India
- No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison.
- Global
- Women: 18–144 nmol/L; Men: 10–57 nmol/L (ranges are age-dependent and vary by lab)
Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
Source: [Endocrine Society, 2018]
What does your SHBG value mean?
There is no widely-accepted set of value bands for this parameter. Compare your result with the reference range printed on your own report, and discuss it with your doctor.
What does a high SHBG result mean?
A high result means more sex hormones are held by this protein. That can leave a smaller usable share for your tissues, which your doctor can interpret.
What happens when your SHBG is high?
When SHBG runs high, it grips more testosterone and estradiol. This leaves a smaller free share for your tissues to use, even when the total looks normal [Endocrine Society, 2018].
What does a low SHBG result mean?
A low result leaves a larger usable share of sex hormones. It often goes with higher body weight, insulin resistance, or an underactive thyroid. This is worth discussing with your doctor.
What happens when your SHBG is low?
When SHBG runs low, it holds less testosterone and estradiol. This leaves a larger free share reaching your tissues [Endocrine Society, 2018].
What can affect your SHBG result?
- Estrogen pills (raise it)
- Higher body weight and insulin resistance (lower it)
- Thyroid status
- Liver function (the main place it is made)
- Aging (it tends to rise with age in men)
Questions to ask your doctor
About this result
- What does my SHBG result mean for me specifically, given my age and health?
- Is my SHBG in the range that is right for me, not just the lab's general range?
What to do next
- Could anything I eat, do, or take have affected my Sex hormone carrier protein result?
- Is there anything I should do about my SHBG, or is it fine to leave as it is?
About retesting
- Does my SHBG need to be repeated, and if so, when?
- The typical range for SHBG can vary between labs — should I compare my result against my own lab's printed range?
The bigger picture
- Should my SHBG be looked at together with my Total Testosterone and Free Testosterone result?
- Does my SHBG connect to any condition I already have, or to anything I have noticed in how I feel?
Frequently asked questions
- What is SHBG?
- SHBG is a protein made mainly by the liver. It binds testosterone and estradiol, and this controls how much reaches your tissues. You may have this test to help make sense of testosterone and estrogen results. It helps most when your symptoms do not match the totals.
- What is a normal Sex hormone carrier protein range?
- A typical adult range is around Women: 18–144 nmol/L; Men: 10–57 nmol/L (ranges are age-dependent and vary by lab). No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison. Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
- What does a high SHBG result mean?
- A high result means more sex hormones are held by this protein. That can leave a smaller usable share for your tissues, which your doctor can interpret.
- What does a low SHBG result mean?
- A low result leaves a larger usable share of sex hormones. It often goes with higher body weight, insulin resistance, or an underactive thyroid. This is worth discussing with your doctor.
- What can affect your SHBG result?
- Several everyday factors can influence it, including Estrogen pills (raise it), Higher body weight and insulin resistance (lower it), Thyroid status, Liver function (the main place it is made), Aging (it tends to rise with age in men).
Sources
- Endocrine Society (2018) — Endocrine Society Clinical Practice Guideline on androgen measurement and SHBG
Part of the Hormones
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