Signs of Low Testosterone in Men: What to Look For
Fatigue, low libido, mood changes and slower recovery are among the low testosterone symptoms many men notice and put down to just getting older. Here is what those signs actually look like, and what it takes to confirm whether testosterone is behind them.
Check your hormone levelsLow testosterone symptoms in men commonly include fatigue, low libido, mood changes, reduced muscle mass and slower recovery from exercise. These signs are common and are often put down to ageing or stress, but they can also point to a hormonal cause. Symptoms alone cannot confirm low testosterone, only a blood test that measures testosterone and related hormones can do that, which is exactly what the Male Hormone Profile checks in one test.
- Symptoms commonly associated with low testosterone include fatigue, low libido, mood changes and reduced muscle recovery
- These symptoms are often written off as normal ageing, but they are worth checking, not ignoring
- Andropause is the broader term for age-related hormonal decline in men, sometimes called male menopause
- Symptoms alone cannot confirm a hormone imbalance, only a blood test measures the actual markers
- The Male Hormone Profile checks testosterone alongside related hormones in one test
- For a simpler starting point, you can also check your testosterone levels on their own
Common low testosterone symptoms in men
Low testosterone symptoms tend to build up gradually, which is exactly why they are so easy to dismiss. Commonly associated symptoms include:
- Fatigue and low energy, feeling tired even after a full night's sleep
- Low libido and other changes to sexual interest or function
- Mood changes, including low mood, irritability or reduced motivation
- Reduced muscle mass and slower recovery after training, even with consistent effort
- Difficulty concentrating, sometimes described as brain fog
None of these symptoms are specific to low testosterone on their own, each has plenty of other possible causes, from sleep quality to stress to nutrient levels. That is exactly why symptoms are a reason to check, not a reason to assume.
How to tell if you have low testosterone
There is no reliable way to tell from symptoms alone. Fatigue, low libido and mood changes can all be caused by things that have nothing to do with hormones, and two men with genuinely low testosterone can present quite differently from each other. The only way to actually tell is a blood test that measures testosterone directly, alongside related markers that help explain the full picture.
Get your hormone levels checked
View the Male Hormone ProfileWhat causes low testosterone in men
Testosterone naturally declines with age for most men, gradually, from around the mid-thirties onward. Beyond ageing, low testosterone is also commonly associated with poor sleep, high stress, being significantly overweight, certain medical conditions, and some medicines. For some men there is no single obvious cause, which is part of why testing matters more than guessing.
What is a dangerously low testosterone level
Reference ranges vary between laboratories and by age, so there is no single number that applies to everyone. Your test report compares your result against the reference range used by that laboratory, and flags anything outside the expected range for your age. A very low result is not something to interpret on your own, it is best discussed with a doctor, who can look at your full result alongside your symptoms.
Can low testosterone cause hair loss
Hair loss in men is mostly driven by genetics and by a testosterone byproduct called DHT, rather than by low testosterone itself. In practice, low testosterone is not a common direct cause of hair loss, though hormonal changes generally can sometimes play a role alongside other factors. If hair loss is your main concern, it is worth discussing with a doctor rather than assuming it is testosterone-related.
Can low testosterone cause depression in men
Low mood and low testosterone are commonly seen together, and some men with low testosterone report symptoms that overlap with depression, such as low motivation, irritability and reduced interest in things they usually enjoy. This is an association, not a direct cause and effect relationship for every man, and mood changes have many possible explanations. If low mood is affecting your daily life, it is worth speaking with a doctor regardless of what a testosterone test shows.
Worth knowing: the reframe that helps here is simple, one test gives you a number, a second test later gives you a direction. Checking your levels does not need to wait until symptoms feel serious.
Andropause: the broader picture of age-related hormonal decline
Andropause is the term sometimes used to describe the gradual, age-related decline in testosterone and related hormones in men, occasionally called male menopause, though the comparison is not exact since the change is much more gradual than in women. It covers the same symptoms already described, fatigue, low libido, mood changes and reduced muscle recovery, framed as part of a longer-term hormonal shift rather than a single event. The practical takeaway is the same either way, symptoms suggest it is worth checking, and a blood test is what actually confirms it.
What actually confirms low testosterone
Symptoms can point you towards testing, but only a blood test measures your actual hormone levels. The Male Hormone Profile checks testosterone alongside related markers, including free testosterone, SHBG, LH, FSH, prolactin, DHEAS and cortisol, so you get the full picture rather than a single number viewed in isolation. If you would rather start with something simpler, you can also check your testosterone levels on their own and expand from there if needed.
Either way, no GP referral is needed. You choose your test, pay online, and get your instant request form straight away, then visit any partner collection centre, with results in 24 to 48 hours. You can also explore our full range of men's health tests if you want to check other markers at the same time.
Frequently asked questions
There is no reliable way to tell from symptoms alone, since fatigue, low libido and mood changes all have other possible causes. A blood test that measures testosterone directly, alongside related hormones, is the only way to actually confirm it.
Testosterone naturally declines with age for most men from around the mid-thirties onward. It is also commonly associated with poor sleep, high stress, being significantly overweight, certain medical conditions and some medicines.
There is no single number that applies to everyone, reference ranges vary by laboratory and by age. Your report flags anything outside the expected range, and a very low result is best discussed with a doctor.
Hair loss is mostly driven by genetics and by a testosterone byproduct called DHT, rather than by low testosterone itself. Low testosterone is not a common direct cause of hair loss on its own.
Low mood and low testosterone are commonly seen together, and some symptoms overlap, such as low motivation and reduced interest in things you usually enjoy. This is an association rather than a guaranteed cause, and low mood is always worth discussing with a doctor.
- Healthdirect Australia. Low testosterone. healthdirect.gov.au
- Endocrine Society of Australia. Testosterone and male hormone health. endocrinesociety.org.au
- Royal Australian College of General Practitioners (RACGP). Androgen deficiency in men. racgp.org.au
- Better Health Channel (Victoria). Testosterone. betterhealth.vic.gov.au
Check your hormone levels
The Male Hormone Profile checks testosterone alongside the related markers that help explain the full picture. No GP referral needed, results in 24 to 48 hours.
View the Male Hormone Profile