Why is Free Testosterone Low? Causes, Symptoms, and What to Do
Low free testosterone can affect your health and well-being. Learn about its causes, symptoms, and when to see a doctor.
Check your result
Calculated in your browser - the number is not sent anywhere.
is below the typical adult range (200–600 pmol/L).
is within the typical adult range (200–600 pmol/L).
is above the typical adult range (200–600 pmol/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 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.Free testosterone is a form of testosterone that is not bound to proteins in the blood, making it biologically active. Understanding why free testosterone levels might be low is important because it can affect various aspects of health, including mood, energy, and physical performance.
What is free testosterone?
Free testosterone refers to the fraction of testosterone that is not bound to proteins like sex hormone-binding globulin (SHBG) in the bloodstream. Unlike bound testosterone, free testosterone is readily available for the body's use. In men, normal free testosterone levels typically range from 200 to 600 pmol/L, while in women, these levels are much lower.
Why does free testosterone matter?
Free testosterone is crucial for many bodily functions. It influences muscle mass, bone density, fat distribution, and the production of red blood cells. It also plays a role in mood regulation and sexual function. Low levels of free testosterone can lead to symptoms such as fatigue, depression, reduced libido, and decreased muscle mass.
Causes of low free testosterone
Several factors can contribute to low free testosterone levels. These include aging, which naturally reduces testosterone production over time. Certain medical conditions, such as hypogonadism (a condition where the testes produce insufficient hormones), obesity, and type 2 diabetes, can also lower testosterone levels. Additionally, lifestyle factors like poor diet, lack of exercise, and excessive alcohol consumption may contribute to decreased testosterone production.
Symptoms of low free testosterone
Symptoms of low free testosterone can vary but often include fatigue, depression, low libido, and difficulty concentrating. Men may experience erectile dysfunction, reduced muscle mass, and increased body fat. Women might notice changes in mood, decreased bone density, and irregular menstrual cycles.
How to read your test results
When you receive your lab results, they will indicate your free testosterone level, measured in pmol/L. For men, a typical range is 200 to 600 pmol/L. Women generally have much lower levels, and specific reference ranges are not always provided. It's important to discuss your results with your healthcare provider to understand what they mean for you specifically.
Frequently asked questions
What can I do to increase my free testosterone levels?
Lifestyle changes such as regular exercise, a balanced diet, reducing stress, and avoiding excessive alcohol can help improve testosterone levels. Always consult with a healthcare provider for personalized advice.
Can women have low free testosterone?
Yes, women can also experience low free testosterone, which may affect their mood, energy levels, and bone health.
Are there treatments for low free testosterone?
Treatment options can include lifestyle changes, hormone replacement therapy, or addressing underlying medical conditions. Your healthcare provider can help determine the best course of action.
When to see a doctor
If you experience symptoms such as persistent fatigue, depression, low libido, or other changes in your health that concern you, consider discussing them with your healthcare provider. They can help determine if low free testosterone is a factor and suggest appropriate treatment options.
Remember, this information is for educational purposes only and should not replace professional medical advice. Decisions about your health should be made in consultation with your healthcare provider.