By Mike Kocsis | 7 minutes read | Last updated: May 6, 2025 Categories: Testosterone
Medically Reviewed by Dr. George Touliatos
From Joe Rogan and Robbie Williams to Sylvester Stallone, 100s of celebrities have turned to TRT to maintain youthful energy and physique.
Some have openly talked about using testosterone to inspire others while others choose to keep their TRT use private because of its personal nature.
Let’s explore the before and after TRT transformation journeys of famous Hollywood figures.
What celebrities are on TRT?
Thanks to their wealth and connections, many celebrities often have early access to advanced medical treatments like TRT. That is why they were among the first to benefit from testosterone administration.
Here are the top celebs who openly discuss using TRT, along with those who are believed by experts to be using it.
Robbie Williams
Former Take That member turned solo artist, Robbie Williams may be the most famous example of a celebrity using TRT.
During his thirties, Williams suffered from depression and low energy levels.
An investigation by doctors found that his testosterone hormone levels were closer to those of an 80-year-old than a man in his prime.
Since then, TRT has helped Williams improve energy levels, reduce body fat, build muscle mass and boost libido.
Sylvester Stallone
Sylvester Stallone is well into his late 70s, but he has still been making appearances as his iconic action heroes Rocky and Rambo.
Part of the reason he has managed to maintain his impressive levels of physical fitness is because he uses TRT and human growth hormone (HGH).
As Stallone himself puts it during an interview with Time magazine, “Everyone over 40 years old would be wise to investigate it, because it increases the quality of your life.”
He has also used these hormones to bulk up for various popular roles, including Rambo.
Alan Ritchson (Reacher)
Alan Ritchson, renowned for his role as Jack Reacher, has openly discussed how testosterone replacement therapy (TRT) aided his physical transformation for the series.
During an interview with the Men’s Health UK, he explains his doctor suggested TRT after the physical strain of filming the first season of Reacher.
This incredible medication helped him recover, maintain muscle mass, and stay fit for the demanding role
Now, Ritchson advocates for men over 40 to consider TRT.
Joe Rogan
Martial artist, commentator and comedian Joe Rogan, 57, is a high profile example in America.
In his popular podcast, The Joe Rogan Experience, he regularly discusses fitness topics, including his personal experience with testosterone therapy.
Rogan has shared how starting TRT at 40 made a big difference in his life, improving his energy, focus, and overall well-being.
In one of his recent episodes, Rogan even mentioned introducing his stepdad to TRT, saying, “I’ve got my stepdad on testosterone replacement, which is nice, and he’s seen benefits of those things.”
Hugh Jackman
At 55, Hugh Jackman showcased his most ripped physique ever for his role in Deadpool 3 as Wolverine.
Although he claims to have achieved this physique through a strict diet and intense exercise, many bodybuilders disagree.
They believe such a transformation at his age is unlikely without hormone replacement therapy (HRT).
Dan Bilzerian
Bilzerian has been open about using testosterone replacement therapy (TRT) to help maintain his physique, especially as he ages.
He believes TRT helps stay in shape, maintain muscle mass/muscle strength, boost energy and improve overall health.
Dax Shepard
Dax Shepard, 50, is a famous American actor, comedian and now a podcaster who has been taking testosterone injections for several years now.
In one of the episodes of his The Armchair Expert podcast, he shares “I spent my whole life as a medium boy. Now I’m a big boy and I like it”.
When a guest praised him for his impressive bicep size, he credited it all to “lifting heavy, protein shakes, going bananas, and heavy testosterone injections.”
Mel Gibson
Rumour has it that another former action movie star, Mel Gibson, has also used TRT to help him stay in shape, despite having switched from performing in front of the camera to directing from behind.
Jeff Bezos TRT journey
As the owner of Amazon, billionaire Jeff Bezos is believed to be the second richest man in the world.
His focus has not just been on his business empire, however, as in recent years, he has used TRT to improve his physique for a noticeably more muscled look.
This has helped him gain not only muscle but also more focus and mental clarity which is essential for any business growth.
Does Bryan Johnson take TRT?
Bryan Johnson, the tech entrepreneur, took TRT for a few months to counteract the effects of a 25% caloric restriction diet, which led to low testosterone levels.
But he no longer uses testosterone replacement therapy (TRT).
Here is his recent tweet explaining his TRT usage:
Is the Rock on Steroids?
Johnson attributes his muscular build to a combination of intense training and a strict diet, and denies using steroids or TRT.
However, some experts and commentators have speculated about the role of hormone replacement therapy (HRT) in maintaining his muscular build.
Is Tony Robbins on TRT?
Tony Robbins has never publicly stated that he is on testosterone replacement therapy (TRT).
That said, in his book Life Force and the company LifeForce, he focuses a lot on the importance of hormonal health or the effects of hormonal imbalance.
Why do celebrities opt for TRT?
Celebrities always stay in the limelight and have to maintain their physical appearance to meet the demands of their career.
Many low T male actors opt for treatments like TRT to help preserve their youthful looks, energy, and overall well-being as they age.
Some of them play demanding roles in action movies that require them to maintain peak physical condition. So, they make TRT a part of their regimen to stay in shape.
What can TRT do for you: TRT before and after effects
TRT before and after can make a great impact on all aspects of your life. Here are the top TRT before and after effects men report:
Before TRT | After TRT |
Fatigue | Increased energy levels |
Low libido | Improved libido |
Weight gain | Better fat distribution & less body fat leading to weight loss |
| Decreased muscle mass | Increased muscle mass & muscle definition |
| Depression | Improved mood |
| Difficulty concentrating | Better focus and concentration |
Conclusion
It can be easy to dismiss the symptoms of low testosterone as just a natural part of ageing. But in recent years, awareness of the effects of low testosterone and ways of treating it have increased.
It only takes a testosterone blood test to diagnose low testosterone and then TRT is available as a testosterone injection, gel or cream.
As the celebrities who use TRT show, testosterone replacement therapy can have a place, whether you are a younger man in your 20s with unhealthily low testosterone or an older man who is struggling with ageing.
It is not a miracle cure, but it can help ease many of the symptoms of low testosterone.
References
Rodrigues dos Santos, M. and Bhasin, S., 2021. Benefits and risks of testosterone treatment in men with age-related decline in testosterone. Annual Review of Medicine, 72(1), pp.75-91.
Yassin, A., Alzubaidi, R.T., Kamkoum, H., Mahdi, M. and Abdallah, H., 2025. The Benefits of Testosterone Therapy (TTh) in Elderly Men. J Med-Clin Res & Rev, 9(2), pp.1-7.
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About the Author: Mike Kocsis
Mike Kocsis has an MBA with a focus on healthcare administration and is an entrepreneur and medical case manager for Balance My Hormones which offers medical services in the UK and Europe. Mike has over 20 years of experience in the healthcare sector, much of that working with people who have hormone imbalances. Mike has appeared on podcasts and radio and is an expert speaker on the subject of hormone imbalance. He specialises in Testosterone Replacement Therapy and Hormone Replacement Therapy (HRT) and has helped thousands of people suffering from hormone imbalances recover and regain control of their lives. You can follow him on LinkedIn and on the Balance My Hormones YouTube Channel.
Last update: May 6th, 2025
