Can Testosterone Deficiency Cause Erectile Dysfunction?
The Relationship Between Testosterone and Male Sexual Health
Testosterone is the primary male sex hormone and plays an important role in male sexual health.
It contributes to sexual desire (libido), energy levels, muscle mass, bone health, and overall quality of life.
For this reason, many men experiencing erectile difficulties wonder whether low testosterone may be the cause.
However, one important fact should be emphasized:
Not every case of erectile dysfunction is caused by testosterone deficiency.
The EAU 2026 Guidelines recognize that testosterone deficiency may be associated with erectile dysfunction, but also emphasize that erectile dysfunction is often a multifactorial condition.
What Is Testosterone?
Testosterone is a hormone produced primarily in the testes.
In men, it contributes to:
Sexual desire
Maintenance of muscle mass
Bone health
Energy levels
Reproductive function
Although testosterone levels naturally change over time, some men may develop levels that are lower than expected.
How Can Low Testosterone Affect Erections?
Testosterone influences erectile function through both direct and indirect mechanisms.
Low testosterone levels may contribute to:
Reduced sexual desire
Decreased sexual responsiveness
Lower erectile quality
However, not every man with low testosterone develops erectile dysfunction, and not every man with erectile dysfunction has low testosterone levels.
What Are the Symptoms of Testosterone Deficiency?
Low testosterone levels may be associated with:
Reduced sexual desire
Fatigue
Low energy
Loss of muscle mass
Reduced physical performance
Changes in mood
Decreased erectile quality
These symptoms are not specific to testosterone deficiency and may occur in other medical conditions as well.
What Is the Difference Between Libido and Erectile Function?
Sexual desire (libido) and erectile function are not the same.
A man may have:
Normal sexual desire but difficulty achieving erections,
Normal erections but reduced sexual desire,
Or both conditions simultaneously.
Testosterone deficiency is particularly associated with reduced sexual desire.
For this reason, evaluation should include all aspects of sexual function rather than focusing solely on erections.
Who Should Have Testosterone Levels Measured?
The EAU 2026 Guidelines recommend considering hormonal evaluation in appropriate patients undergoing assessment for erectile dysfunction.
Testing may be appropriate in men who have:
Reduced sexual desire,
Symptoms suggestive of testosterone deficiency,
Clinical findings raising suspicion of hormonal abnormalities.
How Is Testosterone Deficiency Diagnosed?
Diagnosis is not based solely on a laboratory result.
Assessment of testosterone deficiency requires consideration of:
The patient’s symptoms,
Physical examination findings,
Blood test results.
Therefore, a single testosterone measurement may not always provide sufficient information.
Does Testosterone Therapy Cure Every Case of Erectile Dysfunction?
No.
Testosterone therapy should only be considered in appropriately evaluated men with confirmed testosterone deficiency.
Many men with erectile dysfunction have other contributing causes, including:
Vascular disease
Diabetes mellitus
Hypertension
Smoking
Psychological factors
In such situations, testosterone therapy alone may not be sufficient.
Testosterone and Overall Men’s Health
Testosterone deficiency may affect more than sexual function alone.
Its impact may extend to energy levels, physical performance, body composition, and overall well-being.
For this reason, the evaluation of testosterone levels should be viewed as part of a comprehensive men’s health assessment rather than simply an investigation of erectile function.
Conclusion
Testosterone deficiency can be an important contributing factor to erectile dysfunction in some men.
However, it is not the sole cause of erectile dysfunction, and many men with erectile difficulties have olağan testosterone levels.
Accurate diagnosis requires a combination of symptom assessment, physical examination, and appropriate laboratory testing.
Commentary by Assoc. Prof. Dr. Serdar Yalçın
Many men who present with erectile dysfunction immediately focus on their testosterone levels. However, in clinical practice, erectile dysfunction is often the result of multiple contributing factors. Testosterone deficiency may play an important role in selected patients, but vascular health, metabolic disorders, and lifestyle factors must also be carefully evaluated. Successful treatment begins with an accurate diagnosis and an individualized approach.