5 Low Testosterone Signs and Symptoms in Men

Testosterone is a crucial hormone in men, responsible for regulating several bodily functions, including muscle mass, fat distribution, and sexual health. However, as men age, testosterone levels naturally decline, which can give rise to physical and emotional symptoms.

In this article, we'll explore the common symptoms of low testosterone, share real experiences from men who have dealt with this condition, and discuss when it typically occurs. We'll also offer advice on what to do if you suspect you are affected.

5 Symptoms of low testosterone

Low testosterone, or hypogonadism, can manifest in several ways. Here are five common symptoms:

1. Fatigue and lack of energy: One of the most reported symptoms of low testosterone is a persistent feeling of fatigue. Men with low testosterone often find themselves feeling drained, even after a full night's sleep.

2. Low libido: Testosterone plays a significant role in regulating sexual desire. A noticeable drop in libido, or sexual drive, can be a sign of low testosterone.

3. Erectile dysfunction: While erectile dysfunction (ED) can have many causes, low testosterone levels often are a significant contributor. Men with low testosterone may experience difficulty in feeling aroused, and achieving or maintaining an erection.

4. Mood changes: Testosterone affects many emotional functions. Men with low testosterone levels may experience mood swings, a lack of determination, or even depression.

5. Loss of muscle mass: Testosterone is key to building and maintaining muscle. Men with low levels may notice a reduction in muscle mass and strength, even as they continue to exercise. In fact, strenuous exercise may be counterproductive as low levels of testosterone will impair your ability to recover and repair torn muscle fibres.

Men share their experience of low testosterone

Hearing from men who have experienced low testosterone can provide valuable insights into how this condition can impact daily life.

"Been getting periods of feeling really run down and tired, kept going back to doctors and they ran standard blood tests but got nowhere… just told middle aged men working long hours get tired… I ride often, and go to gym for circuit training and intervals on bike, but never seem to get any fitter or advance at all either. So paid for private test and it came back as being low, which may explain a lot."

"No energy whatsoever. Tired all day and feeling like I could sleep at any time of the day. Couldn't get motivated to do anything whether it was work related or at home. While exercising and working out I could get physically stronger but couldn't lose weight any longer like I always have (managed my weight my whole life) and my body wouldn't physically change in a positive way at all."

"I started experiencing insomnia around the age of 39. I’d wake up feeling tired and was constantly tired during the day, but unable to sleep at least 2 nights a week. I did my best to keep fit and exercise, but the motivation wasn’t there, and I was making no progress at the gym. Blood tests showed that my levels of free testosterone were clinically low."

These testimonials highlight how low testosterone can subtly affect various aspects of life, often without men realising the root cause.

Around what age does low testosterone occur?

Testosterone levels naturally begin to decline as men age, typically starting in their late 30s or early 40s. According to the Cleveland Clinic, testosterone levels decrease by about 1% each year after the age of 30 ⁽¹⁾. By the time men reach their 50s or 60s, many may start to experience symptoms of low testosterone. However, some men may experience symptoms earlier, particularly if they have underlying health conditions that affect hormone levels.

What to do if you have these symptoms

Consult a medical practitioner to discuss your concerns if you suspect that your testosterone levels are low. A simple blood test, ideally performed in the morning, can accurately measure your testosterone levels. In particular, ask your doctor to measure both your total testosterone and free testosterone levels⁽²⁾.

If your levels are low, your doctor may also discuss treatment options, which could include lifestyle changes, such as diet and exercise, or medical treatments like testosterone replacement therapy (TRT).

Your doctor may also suggest further tests to check whether other health issues may be contributing to your low testosterone levels.