‘Low T’ boom raises concerns over overdiagnosis, aggressive marketing to men
Testosterone prescriptions are surging as private clinics, influencers and social media campaigns promote “low T” as a hidden cause of fatigue, weight gain and low libido
Some endocrinologists warn the trend is medicalizing normal aging and ordinary health complaints
A booming testosterone industry fueled by social media influencers, online men’s health clinics and aggressive advertising campaigns is reshaping how many men think about aging, energy and masculinity — and alarming some medical experts who say healthy men are increasingly being convinced they have a medical disorder they may not actually have, according to The Guardian.
The debate is playing out across Britain and the United States as prescriptions for testosterone replacement therapy, commonly called TRT, continue climbing sharply. According to U.K. National Health Service data cited by endocrinologists interviewed by The Guardian, testosterone prescriptions in the U.K. rose 135% between 2021 and 2024. Doctors also report large increases in younger men seeking testing and treatment.
The controversy centers on a simple but increasingly powerful message aimed at men online: if you feel tired, depressed, anxious, unmotivated, overweight or less sexually active than you once were, low testosterone could be the cause.
Critics say that message risks turning ordinary aspects of aging, stress and unhealthy lifestyles into a lucrative medical diagnosis.
“They’ve invented a spurious pseudo-disease,” endocrinologist Dr. Richard Quinton told The Guardian, arguing that many private testosterone clinics are broadening the definition of deficiency to dramatically expand the pool of potential patients.
Many men say it’s life-changing
At the same time, many men receiving TRT describe the treatment as life-changing.
The Guardian profiled several men who said testosterone therapy restored their energy, libido and confidence after years of struggling with fatigue, weight gain and declining mental health. One patient described the experience as “like a second puberty.”
Social media and the rise of ‘T-maxxing’
Medical experts say the testosterone boom is closely linked to the rise of “manosphere” influencers on TikTok, Instagram and YouTube, where hypermasculine fitness personalities frequently promote testosterone testing, supplements and hormone therapy.
Researchers studying the trend say many online influencers portray testosterone as a master key to male success — tied not only to physical fitness but also to confidence, wealth, productivity and sexual dominance.
A recent study published in Social Science and Medicine found that many high-profile social media posts framed ordinary fluctuations in mood, energy and libido as symptoms of testosterone deficiency. Researchers also found that most influencers promoting hormone testing or therapy had financial relationships tied to clinics, supplements or referral programs.
The language used in online advertising often blurs the line between legitimate medical treatment and lifestyle enhancement, critics say.
Terms such as “low T,” “optimization” and “T-maxxing” have become increasingly common in online male wellness communities, particularly among younger men seeking self-improvement or greater physical performance.
Doctors interviewed by The Guardian said many men arriving at clinics have already been primed by online content to believe testosterone is the answer to a wide range of problems.
A rapidly growing business
The surge in demand has coincided with the rapid growth of direct-to-consumer men’s health companies offering at-home blood tests, telehealth consultations and subscription-based testosterone treatment programs.
Companies such as Voy, Numan and Hims market testosterone testing alongside treatments for erectile dysfunction, hair loss and obesity. Ads frequently appear on social media feeds targeting men concerned about aging, weight gain or declining sexual performance.
The Guardian reporter who wrote the article described taking an at-home testosterone test after encountering online advertising. After receiving an email warning that his “free testosterone levels are low,” he said he suddenly began questioning symptoms he had previously dismissed as ordinary stress or aging.
“When I got my results,” the reporter wrote, “I found the thought of having low T unexpectedly emasculating.” That emotional reaction is part of what concerns some physicians.
Experts warn that testosterone marketing can exploit male insecurities surrounding masculinity, virility and aging — especially when symptoms like fatigue, low mood or reduced libido may stem from sleep deprivation, obesity, stress, poor diet or depression.
“Was I fat so I had low testosterone,” one patient asked in The Guardian article, “or was my low testosterone causing me to be fat?”
Doctors divided over treatment thresholds
Part of the controversy stems from the fact that testosterone levels naturally decline with age, and there is no universally agreed threshold defining when low testosterone becomes a medical condition requiring treatment.
NHS guidance generally considers testosterone levels between 8 and 30 nanomoles per liter to be normal, but clinical practices vary.
Some endocrinologists argue many private clinics are treating men whose hormone levels fall within normal ranges.
Others say the medical establishment has historically underdiagnosed testosterone deficiency and ignored symptoms that significantly reduce quality of life.
Doctors supportive of TRT argue the therapy can genuinely help carefully screened patients suffering from clinically meaningful hormone deficiencies.
But critics worry commercial incentives are driving overdiagnosis.
Quinton told The Guardian that private equity firms have invested heavily in testosterone clinics and expect strong financial returns.
Some doctors also fear confusion between legitimate hormone replacement and anabolic steroid use.
“These guys who are ‘T-maxxing,’” one TRT physician told The Guardian, “when you see an absolutely stacked 20-year-old on social media who says he’s using TRT, he’s not; he’s using steroids.”
Potential health risks
Medical experts stress that testosterone therapy is not risk-free.
Unnecessary TRT can suppress the body’s natural testosterone production and may reduce fertility. Doctors have also raised concerns about blood clots, cardiovascular risks and other side effects associated with long-term hormone use.
Some physicians worry men may bypass careful medical oversight entirely by purchasing testosterone through underground suppliers or online pharmacies.
Yet many users remain enthusiastic despite the risks.
One 60-year-old man interviewed by The Guardian said testosterone therapy restored his energy and social life, describing himself as “zipping around” and enjoying nightlife again.
Broader concerns about medicalizing aging
The testosterone debate reflects a broader trend in consumer health marketing, where normal aspects of aging increasingly become framed as treatable medical conditions.
Critics say the commercialization of male aging mirrors earlier controversies surrounding hormone replacement therapy, anti-aging medicine and wellness supplements.
Researchers studying social media testosterone marketing warn that influencers often present a narrow vision of masculinity tied to muscularity, dominance and constant high performance.
Some endocrinologists argue the result is growing anxiety among men who might otherwise see gradual changes in energy, mood or libido as ordinary parts of life.
Still, the appeal remains powerful in a culture increasingly focused on self-optimization, longevity and biohacking.
For many men, the promise of renewed energy, sexual vitality and restored confidence is difficult to resist — particularly when promoted through emotionally charged social media content and polished telehealth platforms.
And as online men’s health companies continue expanding, the fight over what counts as legitimate testosterone deficiency — and what may simply be modern marketing — is likely to intensify.