Many men experience a period of feeling more tired, less energetic, or "not quite themselves" – without being able to pinpoint why. Some of these changes may be due to stress, lack of sleep, or lifestyle, but they can also be signs of low testosterone. In our previous post, we discussed what testosterone is and what role it plays in the body. Here, we delve deeper into the symptoms, how to distinguish them from other possible causes, and when it makes sense to get your levels tested.
The most common symptoms of low testosterone
The symptoms of low testosterone typically affect a wide range and can be divided into three categories:
- Physical symptoms: persistent fatigue, loss of muscle mass and strength, increased body fat (especially around the abdomen), and in some cases, reduced body hair
- Sexual symptoms: decreased libido, erectile dysfunction, and in some cases, reduced sperm quality
- Mental and emotional symptoms: mood swings, irritability, difficulty concentrating, and in more severe cases, feelings of depression
It is rare for a single symptom to occur in isolation. Typically, it is the combination of several of these – and their persistence over time – that should prompt you to consider a test.
When is the decline natural, and when should it be investigated?
Testosterone levels gradually decline in all men from around the mid-30s, typically by about 1% per year. This natural progression rarely causes significant symptoms on its own. Therefore, it's worth paying extra attention if:
- Symptoms appear relatively suddenly, rather than gradually over many years
- You are relatively young (under 40-45 years old) and experience several of the symptoms simultaneously
- Symptoms significantly affect your quality of life, work, or relationships
- You have known risk factors, such as obesity, chronic stress, poor sleep, or a relevant chronic illness
Other conditions that may mimic low testosterone
One of the biggest challenges with symptoms like fatigue and low energy is that they can be caused by several different things. Before concluding that it's about testosterone, it's worth noting that the following conditions can present a similar symptom profile:
- Underactive thyroid function, which also causes fatigue, weight gain, and difficulty concentrating
- Iron or vitamin deficiency, such as vitamin D deficiency or B12 deficiency, which often cause fatigue and reduced energy
- Sleep apnea, where interrupted sleep itself can cause daytime fatigue and mood disturbances, and which can also further lower testosterone levels
- Prolonged stress or burnout, which can lead to a symptom profile very similar to hormonal imbalance
Precisely because the symptoms overlap so much, we always recommend a broader blood test analysis rather than exclusively testing testosterone in isolation – exactly as described in our post about hormonal imbalance in men. If you only test a single hormone, you risk overlooking another equally relevant explanation for your symptoms – and you might end up treating the wrong problem.
Self-check: Is it time to get tested?
You can use the following as a quick guide – not as a substitute for a proper medical assessment:
- Have you experienced 3 or more of the symptoms mentioned above for more than a couple of months?
- Have your symptoms worsened without an obvious cause like stress or lack of sleep?
- Do the symptoms affect your quality of life, your relationships, or your daily life in general?
- Do you also have known risk factors such as obesity or a chronic illness?
If you answer yes to several of these questions, it's a good idea to get a blood test so you can act on facts instead of assumptions.
How the test works, and what happens next
At Valida Health, we don't just test your testosterone levels in isolation, but conduct a comprehensive male hormone analysis that also covers prolactin, LH, FSH, hematocrit, PSA, and long-term blood sugar. This provides a more complete picture and helps rule out – or identify – other underlying causes of your symptoms. If the test shows signs of low testosterone and the symptoms match, you will be referred for assessment by our endocrinologist, who will work with you to create a plan – whether it ends with medical treatment or targeted lifestyle changes.
Why "wait and see" is rarely the best strategy
Many men wait a long time to react to symptoms, often because they attribute them to age, stress, or a busy period that will surely pass. The problem is that low testosterone does not correct itself, and symptoms often gradually worsen if the underlying cause is not identified and addressed. The longer you wait, the longer it can take to regain your previous energy levels and quality of life, whether the solution ends up being medical treatment or lifestyle adjustments. A single blood test gives you an answer you can act on – instead of guessing for months or years.
Frequently asked questions about low testosterone
Can stress alone cause symptoms similar to low testosterone?
Yes, prolonged stress can itself cause fatigue, mood swings, and decreased libido – and can also contribute to a drop in testosterone levels. Therefore, a blood test is the only way to definitively distinguish between the two.
Do I need to fast before getting the blood test?
This may vary depending on what other markers are included in your analysis. You will always receive clear instructions about any preparation when you book your appointment.
Can young men also have low testosterone?
Yes. Although it is most often associated with age-related decline, younger men can also experience low testosterone due to, for example, obesity, chronic diseases, certain medications, or conditions that directly affect the testicles or pituitary gland.
Is one blood test enough to draw a definitive conclusion?
Testosterone levels can fluctuate naturally throughout the day and from day to day, which is one reason why we consider testosterone in conjunction with your other markers and your overall symptom profile, rather than drawing conclusions from a single number.
Book your test at Valida Health today
Living with persistent fatigue, low energy, or decreased libido doesn't have to be "just the way it is." Find out if low testosterone is part of the explanation, and get a plan for what you can do about it.
Book an appointment for your hormone analysis at Valida Health and take the first step towards answers.
