Understanding SHBG Reference Range and Its Significance
Learn about SHBG, its normal values in nmol/L, and what they mean for your health.
Check your result
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is below the typical adult range (18–144 nmol/L).
is within the typical adult range (18–144 nmol/L).
is above the typical adult range (18–144 nmol/L).
This number is very far from the usual range - check which unit your report uses.
A value this far outside the range is worth discussing with your doctor today.
What a low result usually means
What a high result usually means
The range printed on your own report comes first - it differs between laboratories. This is not a diagnosis.
See it next to the rest of your report - upload it for a free, private explanationFree. Sign up with your email - no password, we send you a code.Sex hormone-binding globulin (SHBG) is a protein that plays a crucial role in regulating the levels of sex hormones in your blood. Understanding the reference range for SHBG can help you and your doctor assess your hormonal health. This article will explain what SHBG is, why it matters, and what its normal values mean.
What is SHBG?
SHBG, or sex hormone-binding globulin, is a protein produced mainly by the liver. It binds to sex hormones like testosterone and estrogen, controlling their availability in the body. By binding to these hormones, SHBG helps regulate their effects on various tissues.
Why is SHBG important?
SHBG is important because it affects the amount of free, or active, hormones available to your body's tissues. When SHBG levels are high, less free hormone is available, and when SHBG levels are low, more free hormone is available. This balance is crucial for maintaining normal hormonal function and can impact everything from mood to reproductive health.
SHBG Reference Ranges
The reference range for SHBG can vary based on several factors, including age, sex, and the specific laboratory assay used. For men, the typical range is approximately 18 to 54 nmol/L. For women, the range is broader, typically from 18 to 144 nmol/L. These values are used in conjunction with total testosterone levels to estimate the amount of free hormone in the body.
What affects SHBG levels?
Several factors can influence SHBG levels, including age, sex, and health conditions. For instance, SHBG levels tend to increase with age in men and can be affected by conditions such as liver disease, thyroid dysfunction, and obesity. In women, SHBG levels can fluctuate with the menstrual cycle and may be influenced by contraceptive use and pregnancy.
Frequently asked questions
What does it mean if my SHBG level is high?
High SHBG levels can result in reduced availability of free sex hormones, potentially leading to symptoms like fatigue, decreased libido, or mood changes. It is important to discuss these results with your doctor.
What does it mean if my SHBG level is low?
Low SHBG levels can increase the availability of free sex hormones, which might contribute to symptoms such as acne, hirsutism (excessive hair growth), or irregular menstrual cycles in women.
Can lifestyle changes affect my SHBG levels?
Yes, factors like diet, exercise, and weight management can influence SHBG levels. Healthy lifestyle choices may help maintain normal SHBG levels.
When to see a doctor
If your SHBG levels are outside the typical reference range, or if you experience symptoms such as unexplained fatigue, changes in libido, or menstrual irregularities, it is important to discuss these findings with your doctor. They can help interpret your results in the context of your overall health and determine if further investigation or treatment is necessary.
Please remember, this information is not a substitute for medical advice. Always consult with your healthcare provider for decisions regarding your health.