Celebrities on TRT: Actually confirmed and rumours

Testosterone replacement therapy (TRT) used to be something men whispered about. Now it comes up in Men's Health cover stories, on Joe Rogan's podcast, and in interviews with some of the most recognisable men in the world.

That is a good thing. So many men wait years before getting help with low testosterone because they assume what they are feeling is just ageing. Hearing a public figure describe the same symptoms, and explain what changed when they got treatment, makes it easier for other men to take their own symptoms seriously.

The trouble is, the line between confirmed use and online speculation is rarely drawn clearly. Names get added without sources. HGH gets called TRT. Physique changes get attributed to testosterone when the real explanation is something else, or just very hard work.

Here is what the most talked-about celebrities on TRT have actually confirmed.

Celebrities who have confirmed they use TRT

Robbie Williams

Robbie Williams went to a doctor in Los Angeles looking for human growth hormone. He had noticed older men around him holding onto their energy and appearance and wanted to know what they were taking.

The doctor ran blood tests and came back with something different. Williams told Esquire magazine: "He said, 'You don't need HGH. You've got the testosterone of a 100-year-old man.' And then everything made sense. It was kind of an epiphany that day."

His wife Ayda Field spoke about it on Loose Women. Williams had been struggling with lethargy and depression, not low libido, and neither of them had connected it to testosterone. The minute he started treatment, she said, he had a new lease of life: happy, motivated, energetic. Nothing to do with building muscle.

In interviews in 2023 and 2025, both Williams and Field spoke openly about the impact of coming off TRT: his energy dropped, his mood changed, his libido fell away. They have been candid about what that meant for their relationship.

Worth knowing this before you start: TRT is usually a long-term commitment for men with genuinely low testosterone. Stop without a plan and the symptoms typically come back.

Alan Ritchson

Before filming series one of Amazon's Reacher, Alan Ritchson was given eight months to put on 30 pounds. He built a gym at home, trained, and hit that target without any hormonal support. The consequences caught up with him afterwards.

"I ravaged my body," he told Men's Health UK. "I had a broken AC joint in my shoulder that I had to have repaired. There was a huge imbalance in hormones in my body. I was falling apart."

A blood panel after filming told the full story. "Getting on testosterone was huge for me," he said. "I had none by the time I was done with season one, due to the stress and the fatigue and what I had done to my body." During the gap before series two, his doctor recommended TRT.

His reasoning was straightforward: "For me, it's a long game. I want to do Reacher for 15 years. I don't want to have to have surgery after every season, and testosterone helps."

He has since become an advocate for men looking into it: "I'm a big advocate of it, especially for people in their forties or above. Men aren't aware that it's out there, but it could be really life-changing. It can do a lot more than just help you be buff."

Joe Rogan

Rogan, comedian, UFC commentator, and host of The Joe Rogan Experience, has spoken openly about TRT for over a decade. He started at 40 after noticing declining energy, slower recovery from training, and persistent joint pain that would not shift.

He did not just start injecting testosterone. His doctor tested his blood levels, adjusted his diet first, addressed sleep and stress, then gradually introduced hormones. "First it was cream and then it became injections," he said. "Takes a little bit of time to figure out what works best and then you get to a point where you have the hormone levels of a healthy young man."

He is clear about the ceiling too: "You don't want to elevate beyond that. That's when you run into problems."

Rogan recognises TRT is not a shortcut. It is one part of a wider approach alongside serious training, diet, and recovery. "It makes you feel way better and makes your body work way better," he said. "If you're fine with not feeling as good, stick with that. But if you're not fine with it, hormone replacement therapy exists for a reason."

He has even got his stepdad onto TRT after seeing the difference it made, telling listeners: "I've got my stepdad on testosterone replacement, which is nice, and he's seen benefits of those things."

If you are over 40 and recognise any of those symptoms, checking your testosterone levels is the right starting point.

Sylvester Stallone

Stallone, star of Rocky and Rambo, has TRT use confirmed by Australian court records, which makes him the most definitively documented case on this list.

In February 2007, customs officers found testosterone and 48 vials of Jintropin in his luggage when he landed in Sydney. Jintropin is a synthetic human growth hormone (HGH), a completely separate compound to testosterone and not part of standard TRT. The two got bundled into one story by the press and reported as a celebrity drug scandal. HGH and TRT are not the same thing, and that kind of conflation is part of why prescribed testosterone still carries an undeserved stigma.

The court confirmed his testosterone was legitimately prescribed and used under medical supervision. He was convicted for failing to declare it on his customs form, not for using it. In his letter to the judge he wrote: "I made a terrible mistake, not because I was attempting to deceive anyone but I was simply ignorant to your official rules."

In a 2008 Time magazine interview he said he believes every man over 40 should investigate hormone therapy.

Frank Grillo

Frank Grillo, best known in the UK for playing Crossbones in Captain America: The Winter Soldier and Rick Flag Sr. in James Gunn's DCU, is probably the most open celebrity on this subject.

On Men's Health's Strong Talk podcast in September 2025, he revealed his testosterone level was 260 ng/dL. His doctor told him: "I'm amazed that you can still train the way you're training at those levels." Grillo has been on TRT for six years, taking one shot of testosterone a week.

He was direct about Hollywood: "None of those are natural bodies. Those guys don't walk around looking one way for six months of the year and then all of a sudden have 35 pounds of muscle on them. We all know what they're doing. They might not want to say it, but they all do it. Everybody."

On being called a cheat: "I'm not the linebacker for the New York Giants. I'm not cheating at anything except aging."

Dax Shepard

Dax Shepard is an American actor and host of the Armchair Expert podcast. He discussed testosterone openly on air after his friend Ashton Kutcher pointed out his dramatically changed physique mid-conversation.

He started testosterone in late 2016 during a difficult period, depressed and seriously considering retiring from acting. He went from 185lb to 210lb combining heavy training, protein shakes, and testosterone injections. He has also mentioned that low T runs in his family.

But the physical change was not what stayed with him. "Forget the body; mentally I love it because it makes me far more on fire to be alive. I was depressed. I was literally retiring, that was the plan. I'm out. This is the version I enjoy."

Andrew Huberman

Andrew Huberman is a neuroscientist, Stanford professor, and host of the Huberman Lab podcast, one of the world's most popular science podcasts. In January 2026, during a conversation with a British ex-bodybuilder, he confirmed he had been on TRT since the age of 45.

"I'm on low-dose TRT. I started when I was 45, about 125 milligrams a week," he said.

The admission sparked significant debate. Huberman's brand is built around supplement science, sleep protocols, and lifestyle optimisation, and many listeners had assumed his results were achieved without hormonal support.

He was clear about his position on younger men: "I always tell people they really really really should wait, if do it at all."

Celebrities rumoured to be on TRT

Some names are constantly debated on Reddit threads, TikTok videos, and podcasts. Here is what we know.

Hugh Jackman's physique in Deadpool and Wolverine sparked widespread debate online, with many questioning whether achieving that level of muscle definition at 55 is possible naturally. He has denied steroid or hormone use, telling HBO's Who's Talking to Chris Wallace: "I just did it the old-school way. I've eaten more chickens — I'm so sorry to all the vegans and vegetarians and to the chickens of the world." Reddit users have been unconvinced for years. He has not confirmed TRT use.

Dwayne Johnson, also known as The Rock, admitted to trying steroids briefly as a teenager. "Me and my buddies tried it back in the day when I was 18 or 19. Didn't know what we were doing." He has denied current use ever since.

His physique has changed dramatically over the course of his career. The scepticism is widespread, including from others in the same industry. Joe Rogan, who is himself on TRT, said publicly: "There's not a chance in hell he's clean. As big as The Rock is at 50?"

Jeff Bezos, founder of Amazon, has undergone a physical transformation over the past decade. He has attributed it to daily training, describing a routine of cardio and weightlifting with a personal trainer. It is the kind of transformation that is frequently associated with TRT, but he has never addressed that speculation directly.

Chris Hemsworth claimed to have put on 40 pounds of muscle in five months for Thor: Love and Thunder. Fitness experts say that is essentially impossible without pharmaceutical support. His trainer has denied steroid use and he has not confirmed TRT use.

Dr Jeff Foster, explains

"Many patients worry about side effects, or potential side effects with TRT, and while we have to list all side effects, the vast majority of men experience very little or none. The key point is that virtually all side effects can be managed or mitigated for by speaking to your doctor.

The overwhelming evidence is that TRT remains a safe and effective treatment for the majority of men."

Medical Director Jeff Foster - Men’s Health & TRT Specialist

Is Bryan Johnson on TRT?

Bryan Johnson, founder of Project Blueprint, keeps appearing on lists like this one as a confirmed TRT user. He hasn't been for a while.

He did use testosterone briefly during a caloric restriction experiment. He was cutting calories significantly and anticipated his testosterone might drop, so he introduced it as a precaution before that happened. When the experiment ended, he stopped.

His own words: "I am not on TRT. My LH and FSH are also ideal. Evidence that I am not on TRT."

His blood work backs it up. Testosterone sitting consistently above 700 ng/dL, naturally.

What does TRT actually do?

Testosterone replacement therapy brings testosterone back to a normal healthy level in men with a confirmed deficiency. That means more energy, better mood, restored sex drive, improved muscle recovery, and better sleep, as well as an improvement in the risk of various long-term health conditions such as type-2 diabetes, heart disease, and osteoporosis.

If you are training, restoring low testosterone can make a real difference to strength and body composition. But it is not a transformation drug. The kind of rapid muscle gains you see in Hollywood require doses up to four or five times higher than clinical TRT. That is anabolic steroid use, not TRT.

Every man on this list still trains hard and eats well. TRT gave them back the capacity to do that. It did not do it for them.

Could low testosterone be affecting you?

Persistent tiredness, low mood, reduced sex drive, loss of muscle, poor concentration, broken sleep. These symptoms are easy to dismiss as stress or ageing. But for a lot of men, the cause is hormonal.

A blood test is the only way to know. For men in the UK, TRT is prescription-only. Through the NHS, waiting times can stretch to 50 weeks. With Voy, you start with a simple home blood test.

Check your testosterone levels with Voy.