New research suggests that testosterone and heart health are closely linked in middle-aged men. Specifically, normal testosterone levels may help protect men from a dangerous condition called carotid atherosclerosis — a buildup of plaque in the arteries of the neck. Understanding this connection could change how Canadian men approach their health as they age. As always, speak with your family doctor before making any changes to your health routine.

What Is Carotid Atherosclerosis?

Carotid atherosclerosis is a condition where plaque builds up inside the carotid arteries. These are the large blood vessels on either side of your neck that carry blood to your brain.

Over time, this plaque hardens and narrows the arteries. As a result, blood flow to the brain becomes restricted. This significantly raises the risk of stroke and other serious cardiovascular events.

Doctors often measure the thickness of the artery wall to assess this risk. This measurement is called the intima-media thickness, or IMT. A higher IMT reading generally signals a greater risk of heart disease and stroke.

Testosterone and Heart Health: What the Research Shows

A recent study examined the relationship between testosterone levels and carotid artery wall thickness in men. Researchers studied 99 men with an average age of 58 who were going through andropause — the male equivalent of menopause. Their testosterone levels were measured and compared against artery wall thickness.

The results were then compared with data from 140 sexually mature men with normal hormone levels. This comparison gave researchers a clearer picture of how hormonal changes affect artery health over time.

The findings were significant. Men with lower testosterone levels showed greater carotid artery wall thickness. In other words, testosterone and heart health appear to be directly connected — lower testosterone was linked to more advanced arterial changes.

The Role of Luteinizing Hormone

The study also looked at another hormone called luteinizing hormone (LH). LH is produced by the brain and signals the body to produce testosterone.

Researchers found an inverse relationship between LH levels and artery wall thickness. When LH levels were high — often a sign that testosterone production is struggling — the artery walls tended to be thicker and less healthy.

This finding adds another layer to our understanding of how hormonal balance affects cardiovascular risk in aging men. It suggests the entire hormonal chain matters, not just testosterone alone.

Understanding Andropause in Canadian Men

Many Canadians have heard of menopause, but fewer are familiar with andropause. Andropause refers to the gradual decline in testosterone that most men experience starting in their 40s and 50s.

Unlike menopause, which happens relatively quickly, andropause is a slow process. Testosterone levels typically drop about one to two percent per year after the age of 30. However, in some men, the decline is more dramatic.

Common signs of andropause include fatigue, reduced sex drive, mood changes, difficulty concentrating, and loss of muscle mass. Many Canadian men dismiss these symptoms as simply “getting older.” In reality, they may be signs of a significant hormonal shift worth discussing with a doctor.

How Common Is Low Testosterone?

Low testosterone — also called hypogonadism — is more common than many people think. According to Mayo Clinic’s overview of male hypogonadism, this condition affects millions of men worldwide.

In Canada, many cases go undiagnosed because the symptoms are gradual and easy to overlook. Furthermore, not all provincial health plans automatically screen for testosterone levels during routine checkups. This means men may need to specifically ask their family doctor for a blood test.

Heart disease remains one of the leading causes of death among Canadian men. According to Health Canada’s heart health resources, cardiovascular disease accounts for a significant portion of all male deaths each year in this country.

Therefore, identifying new risk factors — like low testosterone — is important. If hormonal decline contributes to arterial damage, it opens the door to new ways of managing cardiovascular risk.

This research highlights a potentially underappreciated factor in men’s heart health. Most cardiovascular risk assessments focus on blood pressure, cholesterol, smoking, and diet. However, hormonal health may deserve a place on that list too.

Does Testosterone Replacement Therapy Help?

This is a question many men and their doctors are asking. The study in question specifically calls for more research into the effects of testosterone supplementation after andropause begins.

Testosterone replacement therapy (TRT) is already used to treat symptoms of andropause in some Canadian men. However, its long-term effects on heart health are still being studied. Some earlier research raised concerns about cardiovascular risk with TRT, while newer studies suggest it may actually be protective in certain groups.

The bottom line is that this is an active area of research. No definitive conclusions have been reached, and treatment decisions should always involve a qualified healthcare provider. For a broader look at the evidence, Healthline’s review of testosterone and heart disease offers a helpful summary of the current science.

Protecting Your Heart as You Age

Whether or not testosterone replacement therapy turns out to be beneficial, there are many proven steps Canadian men can take to protect their hearts as they age.

A heart-healthy lifestyle remains the foundation of cardiovascular protection. This includes eating a diet rich in fibre, fruits, vegetables, and healthy fats. It also means staying physically active, managing stress, limiting alcohol, and avoiding smoking.

Diet and Lifestyle Tips for Middle-Aged Men

  • Eat more fibre: Whole grains, legumes, and vegetables support healthy cholesterol levels.

  • Exercise regularly: Aim for at least 150 minutes of moderate activity per week, as recommended by Canadian guidelines.

  • Maintain a healthy weight: Excess body fat, especially around the abdomen, is linked to lower testosterone and higher cardiovascular risk.

  • Limit alcohol: Heavy drinking can suppress testosterone production and damage the heart over time.

  • Get quality sleep: Most testosterone is produced during deep sleep. Poor sleep can worsen hormonal decline.

  • Manage stress: Chronic stress raises cortisol, which can suppress testosterone levels.

  • Quit smoking: Smoking directly damages blood vessels and worsens atherosclerosis.

These lifestyle habits benefit your heart, your hormones, and your overall wellbeing. Furthermore, they are supported by decades of solid scientific evidence.

Know Your Numbers

It is worth asking your family doctor to check not just your blood pressure and cholesterol, but also your testosterone levels if you are a man over 40. Many provincial health plans cover routine blood work, and a simple test can reveal a great deal about your hormonal health.

Early detection of low testosterone gives you and your doctor more options. Addressing it sooner rather than later may help protect your heart and your quality of life in the years ahead.

When to See a Doctor

You should speak with your family doctor if you notice signs of andropause or declining testosterone. These include unexplained fatigue, changes in mood or behaviour, reduced sex drive, difficulty concentrating, or increased body fat despite no change in diet.

Your doctor can order a blood test to check your hormone levels. If you do not have a family doctor, a walk-in clinic is a good starting point. Many walk-in clinics across Canada can refer you to the appropriate specialist if needed.

Do not ignore cardiovascular symptoms either. Chest pain, shortness of breath, dizziness, or sudden weakness should always be assessed right away — call 911 or go to your nearest emergency department immediately.

It is also worth asking your doctor about a cardiovascular risk assessment. This is a broader evaluation that looks at multiple risk factors together, giving you a more complete picture of your heart health. Some provincial health plans include these assessments as part of preventive care for men over a certain age.

Frequently Asked Questions

Does low testosterone increase the risk of heart disease?

Research suggests there is a meaningful link between testosterone and heart health. Men with lower testosterone levels appear to have greater arterial wall thickness, which is a known marker of cardiovascular risk. However, more research is still needed to fully understand this relationship.

What is carotid atherosclerosis and why does it matter?

Carotid atherosclerosis is the buildup of plaque in the carotid arteries, which supply blood to your brain. As the arteries narrow, the risk of stroke and heart attack increases. Measuring the thickness of the artery wall helps doctors assess this risk early.

What is andropause and how does it affect men?

Andropause is the gradual decline in testosterone that most men experience starting in their 40s and 50s. It can cause fatigue, mood changes, reduced sex drive, and loss of muscle mass. Because the changes are slow, many Canadian men do not realize they are going through andropause.

Can testosterone replacement therapy protect the heart?

The relationship between testosterone replacement therapy and heart health is still being actively researched. Some studies suggest it may be protective, while others have raised concerns. Always discuss the potential benefits and risks with your family doctor before considering any hormone therapy.

How can I get my testosterone levels checked in Canada?

Ask your family doctor to include a testosterone level test as part of your routine blood work, especially if you are a man over 40. Many provincial health plans cover standard blood tests. If you do not have a family doctor, a walk-in clinic can help arrange initial testing.

What lifestyle changes can naturally support testosterone and heart health?

Regular exercise, a high-fibre diet, quality sleep, stress management, and avoiding excessive alcohol can all support both testosterone levels and cardiovascular health. These lifestyle habits are backed by strong evidence and benefit your overall wellbeing. They are a good starting point for any man looking to protect his heart as he ages.

Key Takeaways

  • Testosterone and heart health are connected: Research shows that lower testosterone in middle-aged men is linked to thicker carotid artery walls, a sign of increased cardiovascular risk.

  • Andropause is real and measurable: The gradual decline in testosterone after age 40 can have effects that go well beyond mood and libido — it may also affect your arteries.

  • Luteinizing hormone matters too: High LH levels, which often signal struggling testosterone production, were also linked to poorer artery health in the research.

  • More research is needed: Scientists are still working to determine whether testosterone replacement therapy can meaningfully reduce cardiovascular risk in aging men.

  • Lifestyle remains key: A heart-healthy diet rich in fibre, regular physical activity, quality sleep, and stress management can support both testosterone levels and heart health.

  • Talk to your doctor: If you are a man over 40, ask your family doctor about checking your testosterone levels and assessing your cardiovascular risk. Early action can make a real difference.