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Low testosterone, or Low T, is a medical condition known as hypogonadism (hi-po-go-na-dizm) and can cause symptoms such as: reduced sex drive, reduced energy, and sexual dysfunction, among others. It’s estimated to affect millions of men in the U.S. If you feel you’re experiencing the signs and/or symptoms of Low T, talk to your doctor to learn more about all the signs and symptoms of Low T and see if you should be tested.

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Reduced Sex Drive

Low T can cause low libido (decreased sex drive), which is a lack of desire for sex that may lead to reduced sexual activity.


Decreased Energy

Some men may think loss of energy is just a part of aging. However, low energy may not just be a sign of getting older—it may also be a symptom of Low T. Some men with Low T may experience daily fatigue. Men who lack energy due to Low T may even find it difficult to do routine tasks.


Unwanted Body Changes

If you have Low T, you may feel that your body is changing. You may notice reduced muscle mass, an increase in body fat, or decreased bone strength. Testosterone helps increase muscle mass and strength, and maintain bone strength.


Mood Changes

Changes in mood, such as depressed mood may be a sign of Low T.


Sexual Dysfunction

Low T and erectile dysfunction (ED) are different health conditions with different symptoms.

If you're having difficulty maintaining erections, it may be more than ED. For some males, it may be a sign that they have Low T.