TRT Myths vs. Facts: 10 Common Misconceptions About Testosterone Therapy

Few medical topics are as plagued by half-truths, outdated studies, and fitness-forum opinions as testosterone replacement therapy (TRT). Men considering TRT are bombarded with contradictory information online — from "testosterone causes heart attacks" to "TRT is steroid doping." This creates uncertainty and means many men with confirmed testosterone deficiency go untreated, despite therapy potentially significantly improving their quality of life.

This fact-check examines the 10 most common myths about TRT using current scientific evidence — objectively, with nuance, and with citations.

Myth 1: "TRT Causes Heart Attacks"

Fact: The largest and most conclusive study on this topic — the TRAVERSE study (2023) — has definitively dispelled this concern. With over 5,000 participants and a duration exceeding 3 years, it showed that TRT compared to placebo does not increase the risk of major adverse cardiovascular events (heart attack, stroke, cardiovascular death) (Lincoff et al., 2023).

This myth originated from a study published in 2010 (TOM Trial) that was later heavily criticised for methodological flaws and was prematurely terminated. The FDA subsequently mandated the TRAVERSE study, which investigated cardiovascular risk prospectively and in a randomised manner — with reassuring results.

Myth 2: "TRT Is the Same as Steroid Doping"

Fact: TRT and anabolic steroid abuse are fundamentally different. In medically indicated TRT, the body's own hormone is replaced at physiological doses — the goal is a normal testosterone level in the mid-reference range. Anabolic doping, by contrast, uses supraphysiological doses (often 5–20 times the TRT dose), frequently in combination with multiple substances, and without medical supervision.

TRT is an approved medication prescribed for diagnosed hypogonadism and covered by Swiss mandatory health insurance. It is comparable to insulin therapy for diabetes or thyroid hormone supplementation for hypothyroidism — not a muscle-building trick but an evidence-based hormone replacement therapy.

Myth 3: "TRT Makes You Aggressive"

Fact: The scientific evidence shows the opposite. Men with low testosterone more frequently report irritability, mood swings, and emotional instability. Normalising testosterone levels through TRT typically improves mood and emotional balance — not aggressiveness.

The "roid rage" myth stems from the context of anabolic steroid abuse with extremely high doses. At physiological TRT doses, no controlled study has demonstrated an increase in aggressive behaviour (Bhasin et al., 2018).

Myth 4: "TRT Causes Prostate Cancer"

Fact: This myth dates back to the work of Huggins and Hodges in the 1940s, who showed that testosterone deprivation slows prostate cancer. From this, it was incorrectly concluded that testosterone supplementation causes prostate cancer. Current data argues against this: large-scale studies and meta-analyses have shown no association between physiological TRT and an increased prostate cancer risk.

The TRAVERSE study confirmed that TRT over more than 3 years did not cause an increase in prostate cancer risk. Current Endocrine Society guidelines categorise active prostate carcinoma as a contraindication — but not the general risk of developing prostate cancer (Bhasin et al., 2018).

Regular PSA monitoring during TRT is nonetheless standard and performed at every follow-up check.

Myth 5: "Once on TRT, Always on TRT — You Can Never Stop"

Fact: This requires nuance. With diagnosed hypogonadism from an organic cause (e.g. age-related, after testicular injury), the underlying cause is generally not reversible — TRT compensates for a permanent deficiency. This is comparable to thyroid hormones for hypothyroidism: you take them because the body does not produce sufficient hormone on its own.

If TRT is discontinued, symptoms typically return because the cause of deficiency persists. However, a supervised discontinuation attempt is possible at any time — natural production recovers in many cases, though this takes time (weeks to months). Your physician at Swiss TRT will support you through a discontinuation attempt as well.

Myth 6: "TRT Causes Infertility"

Fact: TRT suppresses the body's own sperm production — this is correct and a known pharmacological effect. Exogenous testosterone signals the pituitary to reduce LH and FSH production, which in turn reduces spermatogenesis. However, this effect is reversible in most cases: after discontinuing TRT, sperm production typically recovers within 6–12 months.

For men with active plans for fatherhood, alternatives exist: HCG (human chorionic gonadotropin) can be used alongside TRT or as an alternative to maintain testicular function. Fertility plans should always be discussed before starting therapy — a responsible physician will adjust the treatment accordingly.

Myth 7: "Testosterone Gel Is Less Effective Than Injections"

Fact: Both delivery forms are equally effective when the dose is correctly adjusted. The TRAVERSE study — the largest TRT safety trial ever — was conducted with testosterone gel and confirmed significant improvements in sexual function, vitality, and quality of life (Pencina et al., 2023).

The difference lies in pharmacokinetics and handling, not efficacy. A detailed comparison is available in our article on TRT gel vs. injection.

Myth 8: "Only Old Men Need TRT"

Fact: While the prevalence of testosterone deficiency increases with age, hypogonadism is not purely an age-related condition. Men in their 30s and 40s can also have clinically relevant testosterone levels — particularly with obesity, chronic stress, sleep disorders, or genetic predisposition.

The Travison study even showed that testosterone levels are declining across generations: a 35-year-old man today may have lower values than his father at the same age (Travison et al., 2007). More on this in our article about testosterone after 30.

Myth 9: "TRT Costs a Fortune"

Fact: In Switzerland, TRT for physician-diagnosed hypogonadism is fully covered by mandatory basic health insurance (OKP) — minus deductible and co-payment. Medication costs range from CHF 30–120 per month depending on the preparation, most of which is reimbursed. Telemedicine consultations are also recognised by basic insurance. Detailed cost breakdowns are available in our article on TRT costs in Switzerland.

Myth 10: "You Can Just Order Testosterone Online and Take It Yourself"

Fact: Testosterone is a prescription-only medication in Switzerland. Purchasing without a prescription — whether from foreign online shops or the black market — is illegal and dangerous. Without medical diagnostics and monitoring, you risk overdose, polycythaemia (life-threatening blood thickening), suppression of natural hormone production, and infertility.

The right pathway always goes through medical diagnosis — whether in person or via telemedicine. At Swiss TRT, you receive a medically rigorous evaluation with regular follow-up monitoring and a therapy plan tailored to you.

Conclusion: Evidence Over Emotion

Most myths about TRT are based on outdated studies, confusion with anabolic steroid abuse, or simple ignorance. The scientific evidence today is clearer than ever: medically indicated TRT under physician supervision is safe, effective, and can substantially improve quality of life for men with confirmed testosterone deficiency. The TRAVERSE study has definitively dispelled cardiovascular concerns, and current Endocrine Society guidelines recommend TRT as standard therapy for symptomatic hypogonadism. Do not let outdated myths prevent you from receiving evidence-based treatment. A good first step is our free online self-test, which provides an initial assessment of whether further investigation is advisable. For questions, the Swiss TRT medical team is available via telemedicine consultation.

FAQ

Is TRT safe?

Yes, with correct indication, appropriate dosing, and regular medical monitoring, TRT is a safe and well-researched therapy. The TRAVERSE study (2023) — the largest randomised TRT trial with over 5,000 participants — confirmed that TRT does not increase cardiovascular risk. Simultaneously, the Testosterone Trials showed significant improvements in sexual function, vitality, and mood. Key to safety are regular blood checks, the right dose, and an experienced physician.

Can I take TRT if I am over 60?

Yes, the TRAVERSE study specifically included men aged 45–80 and confirmed safety and efficacy in this age group as well. The Testosterone Trials (TTrials) studied men over 65 and demonstrated significant improvements in sexual function and vitality. It is important that contraindications (e.g. active prostate carcinoma, severe heart failure) are excluded. Your physician at Swiss TRT considers your age and medical history in individual therapy planning.

How does medical TRT differ from bodybuilding steroids?

The difference is fundamental: TRT replaces a hormone the body does not produce in sufficient quantities — at physiological doses, under medical supervision, with regular blood monitoring. The goal is a normal testosterone level. Bodybuilding steroids use supraphysiological doses (often 5–20 times higher), frequently multiple substances simultaneously, without medical oversight. The risks differ accordingly. TRT is a medically indicated therapy; steroid doping is drug abuse.

Is there anything I should consider before starting TRT?

Yes, before starting, at least two morning blood tests should confirm testosterone deficiency. Your physician will exclude contraindications (active prostate carcinoma, uncontrolled heart failure, severe polycythaemia). If you have plans for fatherhood, therapy must be adjusted (e.g. HCG instead of or in addition to testosterone). Our online self-test provides a quick initial indication.

Further Reading

• TRT Experiences: What Men Report
• TRT Gel vs. Injection: Which Form Suits You?
• Telemedicine for TRT: How It Works