TRT Myths: Hair Loss, Fertility, Prostate Health and More

Oct 12, 2026By Lindsay Flick
Lindsay Flick

TRT Myths: Hair Loss, Fertility, Prostate Health and More

Search “TRT side effects” online and you'll quickly find yourself buried in conflicting information.

TRT causes prostate cancer.

TRT prevents aging.

Testosterone makes everyone aggressive.

TRT makes you infertile.

Testosterone is dangerous for your heart.

TRT will give you all your energy back.

The reality is more nuanced.

Let's talk about it.

Myth: TRT Is Basically an Anti-Aging Treatment
Testosterone replacement therapy is intended to treat appropriately diagnosed testosterone deficiency.

Getting older isn't, by itself, a diagnosis.

The purpose of medical testosterone therapy isn't to push testosterone as high as possible. Treatment should be individualized based on clinical findings, laboratory testing, response, adverse effects, and appropriate monitoring.

Myth: TRT Automatically Causes Prostate Cancer
The relationship between testosterone and prostate health is more complicated than the old idea that testosterone simply “feeds” prostate cancer.

That doesn't mean prostate health can be ignored.

A man's age, history, symptoms, risk factors, and appropriate prostate evaluation should be considered when deciding whether testosterone therapy is suitable and how treatment should be monitored.

Myth: TRT Has Nothing to Do With Fertility
This one can have significant consequences.

External testosterone can suppress the body's hormonal signaling to the testes.

As a result, sperm production can decrease—sometimes substantially.

If having biological children matters to you now or might matter later, tell your healthcare provider before starting TRT.

Myth: Testosterone Always Causes Hair Loss
Male-pattern hair loss is influenced heavily by genetics and androgen sensitivity.

Testosterone and its metabolites can play a role in androgen-related hair loss in genetically susceptible men, but taking TRT does not mean every man will suddenly become bald.

Your personal and family history matter.

Myth: TRT Makes Men Aggressive
Normalizing a medically deficient hormone level is not the same thing as abusing supraphysiologic doses of anabolic-androgenic steroids.

Mood changes can occur and should be monitored, but appropriate medical TRT shouldn't be confused with nonmedical anabolic steroid use.

Myth: More Testosterone Is Better
This may be one of the most important misconceptions.

The objective of treatment isn't:

Get the highest testosterone number possible.

The objective is appropriate treatment of a documented deficiency while monitoring symptoms, laboratory values, adverse effects, and overall health.

More isn't automatically better.

What Are the Actual Risks?
Testosterone therapy isn't risk-free.

Potential concerns can include increased hematocrit, acne or oily skin, changes in fertility, testicular volume changes, fluid retention, and other adverse effects. Individual medical conditions may also change whether TRT is appropriate.

That's exactly why ongoing monitoring matters.

TRT Should Be Medical Care
TRT shouldn't feel like buying a monthly subscription to testosterone.

There should be an evaluation.

There should be a reason for treatment.

There should be follow-up.

There should be laboratory monitoring.

And there should be conversations about risks, benefits, fertility, goals, and alternatives.

That's the standard we want to bring to men's health at Hodag HydrO2.

Coming next: Testosterone and fertility—what every younger man should know before starting TRT.

Educational information only. Testosterone therapy has potential benefits, risks, contraindications, and monitoring requirements that should be discussed with a qualified healthcare professional.