Does TRT Increase Your Risk of Heart Attack or Stroke? What the Research Actually Shows
One of the biggest concerns men have before starting testosterone replacement therapy is:
“Is TRT bad for my heart?”
For years, testosterone therapy has been surrounded by conflicting headlines. One article might suggest testosterone increases the risk of heart attack or stroke, while another claims testosterone is actually protective for the cardiovascular system.
The reality is more nuanced.
Recent large clinical trials have given us considerably better information about the cardiovascular safety of testosterone replacement therapy. The evidence today is more reassuring regarding heart attack and stroke than it was a decade ago—but that doesn't mean TRT is risk-free or appropriate for everyone.
Let's look at what we actually know.
Why Was There Concern About TRT and Heart Disease?
Concerns about testosterone and cardiovascular disease didn't come out of nowhere.
Earlier studies produced conflicting results. Some observational studies suggested an association between testosterone therapy and cardiovascular events, while others suggested men with low testosterone actually had higher rates of cardiovascular disease.
That created a difficult question:
Was testosterone therapy increasing cardiovascular risk, or were men with low testosterone already more likely to have underlying health problems that increased their cardiovascular risk?
More recent randomized clinical trials have helped answer some of these questions.
What Did the TRAVERSE Trial Find?
One of the most important studies in this discussion is the TRAVERSE trial.
TRAVERSE included more than 5,200 middle-aged and older men who had symptoms of hypogonadism, repeatedly low testosterone levels, and either existing cardiovascular disease or an increased risk of cardiovascular disease.
Men were randomly assigned to receive testosterone therapy or placebo.
The primary cardiovascular outcome included cardiovascular death, nonfatal heart attack, and nonfatal stroke.
The major finding?
Testosterone therapy did not meaningfully increase the overall risk of heart attack or stroke compared with placebo during the trial's follow-up period.
The Endocrine Society highlighted these findings in its 2026 statement on testosterone replacement therapy.
That's reassuring—but it isn't the end of the story.
Does That Mean TRT Is Completely Safe for Your Heart?
No medication should be described as completely risk-free.
TRAVERSE provided reassuring evidence regarding major cardiovascular events, but some other findings deserve attention.
The Endocrine Society notes that the TRAVERSE studies identified an increased incidence of pulmonary embolism, with roughly a 50% relative increase among testosterone-treated men. The Society has emphasized that additional research is needed to better understand thromboembolic risk and which patients may be particularly susceptible.
Long-term questions also remain because clinical trials can only follow patients for a finite period.
So the correct takeaway isn't:
“TRT has zero cardiovascular risk.”
It's closer to:
Current evidence is reassuring regarding heart attack and stroke when testosterone is appropriately prescribed for men with diagnosed hypogonadism, but treatment still requires proper patient selection and monitoring.
Low Testosterone and Cardiovascular Health
There's another part of this conversation that often gets overlooked.
Low testosterone itself is associated with cardiovascular disease.
The American Urological Association considers low testosterone a risk factor associated with cardiovascular disease and recommends evaluating men with testosterone deficiency for cardiovascular risk factors such as:
High blood pressure
High cholesterol
Diabetes
Smoking
Obesity
However, an association doesn't necessarily mean low testosterone directly causes cardiovascular disease.
Men with obesity, metabolic syndrome, diabetes, chronic illness, and other health problems are also more likely to have lower testosterone.
The relationship goes both ways and is considerably more complicated than simply saying "low testosterone causes heart disease."
Is TRT a Treatment for Heart Disease?
No.
This distinction is important.
Even though appropriately prescribed TRT may improve symptoms of testosterone deficiency, testosterone shouldn't be prescribed specifically as a treatment to prevent heart attacks or improve cardiovascular risk.
The Endocrine Society recommends treating appropriately diagnosed testosterone deficiency based on symptoms and clinical indications—not using testosterone as a treatment for dyslipidemia or cardiovascular disease.
TRT should be used to treat appropriately diagnosed hypogonadism.
It isn't a substitute for managing blood pressure, cholesterol, diabetes, obesity, smoking, exercise, nutrition, and other established cardiovascular risk factors.
What About Hematocrit?
This is one of the most important things to monitor during TRT.
Testosterone can stimulate red blood cell production, causing hemoglobin and hematocrit to increase.
Hematocrit represents the percentage of your blood volume made up of red blood cells.
An excessively elevated hematocrit is something your healthcare provider needs to evaluate rather than simply ignore.
This is one reason a complete blood count, or CBC, is commonly monitored in men receiving testosterone therapy.
The Endocrine Society recommends against initiating testosterone therapy in men with an elevated hematocrit and recommends ongoing evaluation after therapy begins.
TRT isn't simply:
Get testosterone → inject testosterone → repeat forever.
Appropriate monitoring is part of the treatment.
What About Blood Pressure?
Blood pressure deserves attention as well.
A man considering TRT should have his overall cardiovascular health evaluated rather than focusing exclusively on his testosterone level.
That includes looking at things like:
Blood pressure
Cholesterol
Blood sugar
Body composition
Smoking status
Family history
Sleep apnea
Exercise
Diet
Existing cardiovascular disease
Testosterone therapy doesn't erase the cardiovascular consequences of uncontrolled hypertension, diabetes, smoking, severe obesity, or poor metabolic health.
Hormone optimization should be one part of a larger approach to health.
Can You Start TRT After a Heart Attack or Stroke?
Timing matters.
The Endocrine Society recommends against initiating testosterone therapy in men who have experienced a myocardial infarction or stroke within the previous six months.
Someone with established cardiovascular disease isn't automatically excluded from testosterone therapy forever.
But these patients require individualized evaluation of their medical history, current cardiovascular status, symptoms, testosterone levels, and potential risks and benefits.
This is exactly why testosterone treatment shouldn't be based solely on a lab number.
Who Should Be More Cautious With TRT?
Certain medical conditions deserve additional attention before testosterone therapy is initiated.
Depending on the individual situation, these may include:
Recent heart attack or stroke
Elevated hematocrit
History or elevated risk of blood clots
Untreated severe obstructive sleep apnea
Uncontrolled heart failure
Significant cardiovascular disease
Certain prostate-related concerns
Men actively planning fertility
Current Endocrine Society guidelines identify several of these as situations in which testosterone therapy should not be initiated without appropriate evaluation or management.
Does TRT Cause Blood Clots?
This question deserves a more nuanced answer than simply yes or no.
Testosterone can increase hematocrit, and the TRAVERSE findings raised additional questions about pulmonary embolism and venous thromboembolism.
However, researchers still don't fully understand which patients may be most susceptible or how factors such as underlying thrombophilia influence that risk.
The appropriate response isn't panic.
It's screening, patient selection, appropriate dosing, and monitoring.
Is More Testosterone Better?
Absolutely not.
There's an important distinction between testosterone replacement therapy and using supraphysiologic doses of testosterone or anabolic-androgenic steroids for performance enhancement.
The goal of medically supervised TRT is not to push testosterone as high as possible.
Appropriate testosterone therapy aims to treat a documented deficiency and improve clinically relevant symptoms while monitoring for adverse effects.
The cardiovascular research involving medically prescribed replacement therapy should not automatically be extrapolated to bodybuilding-level testosterone or anabolic steroid use.
Those are fundamentally different exposures.
What Should Be Monitored While You're on TRT?
Monitoring should be individualized, but depending on the patient, it may include:
Testosterone levels
Hemoglobin and hematocrit
Blood pressure
PSA
Symptoms and treatment response
Medication side effects
Cardiovascular risk factors
Sleep apnea symptoms
Metabolic health
Monitoring shouldn't just be about making sure testosterone went up.
It's also about making sure treatment remains appropriate, effective, and safe.
So, Is TRT Bad for Your Heart?
Based on the best evidence we currently have, the old blanket statement that “TRT causes heart attacks” isn't supported.
Large randomized clinical trial data have been reassuring regarding heart attack and stroke in appropriately selected men with hypogonadism.
But the opposite extreme isn't accurate either.
We shouldn't tell patients that TRT is completely risk-free or that taking testosterone will protect them from cardiovascular disease.
There are still unanswered questions surrounding long-term safety, pulmonary embolism, and certain higher-risk populations.
The better question is:
Is testosterone therapy appropriate and reasonably safe for this particular patient?
That requires looking at much more than a testosterone number.
Our Approach at Jersey Shore TRT
At Jersey Shore TRT, testosterone replacement therapy isn't about getting your testosterone as high as possible.
It's about identifying true testosterone deficiency, understanding the patient's symptoms and health history, discussing the benefits and risks of treatment, and appropriately monitoring therapy over time.
That means cardiovascular health matters.
Blood pressure matters.
Hematocrit matters.
Sleep apnea matters.
Metabolic health matters.
And the way a patient actually feels matters.
TRT can be an effective treatment for appropriately diagnosed testosterone deficiency, but good testosterone care requires looking at the whole patient—not just their testosterone level.
If you're experiencing symptoms of low testosterone or you're considering TRT but concerned about cardiovascular risk, Jersey Shore TRT can help you understand your laboratory results, risk factors, and treatment options.
This article is for educational purposes only and does not constitute medical advice. Testosterone therapy requires an individualized medical evaluation and ongoing monitoring by a qualified healthcare professional.
