A Hollywood martial arts legend who trained some of the biggest names in show business died after injecting experimental substances into his body, and newly released findings have revealed disturbing details about his final hours.
Richard Norton, the Australian actor, stuntman and fight choreographer who worked with stars including Scarlett Johansson, Margot Robbie, Ben Affleck and Chuck Norris, was 75 when he died in March 2025. Now, more than a year later, a coroner has determined that his death was triggered by an injection of unapproved peptides, making his case what is believed to be Australia’s first confirmed fatality linked to the substances.
The revelation has raised serious questions about the growing popularity of experimental treatments promoted for muscle growth, faster recovery and anti-aging benefits.
According to findings released Wednesday, October 28, Norton had been receiving injections of two peptides, CJC-1295 and ipamorelin, after seeking treatment for fatigue, shoulder pain, reduced physical recovery and declining muscle mass.
The substances, which are marketed for their potential to stimulate growth hormone production, have not been approved by Australia’s Therapeutic Goods Administration (TGA) for therapeutic use.
Despite their experimental status, Norton had obtained the injections through a doctor, with the medication prepared by a licensed compounding pharmacy.
But investigators uncovered a troubling detail: The action star had been administering twice the amount his doctor prescribed.
Just three days before his collapse, Norton told his physician, Dr. Jerzy Muchnicki, that he was feeling good and believed the treatment was helping him.
On March 28, however, he admitted to a nurse at the clinic that he had been taking double the recommended dose. The nurse advised him to return to the prescribed amount beginning the following week.
Hours later, Norton’s condition took a devastating turn.
At approximately 9 p.m., the martial arts expert injected himself with another dose of the peptides. His wife, Judy, later told investigators that he had already administered an injection earlier that morning.
Shortly after the evening injection, Norton complained of feeling unusually hot and flushed before suddenly collapsing and becoming unresponsive.
Judy began performing CPR while emergency assistance was summoned. Paramedics arrived to find Norton in cardiac arrest and managed to restore his circulation before transporting him to Melbourne’s Alfred Hospital.
Despite medical efforts, Norton died two days later, on March 30, 2025.
The investigation revealed that Norton had experienced warning signs before his collapse, including redness, swelling and episodes of widespread flushing following earlier injections.
On the morning of his collapse, he had also experienced chest tightness and shortness of breath, symptoms that reportedly eased after he used his asthma inhaler.
Coroner David Ryan determined that the fatal injection triggered anaphylaxis, a severe allergic reaction that led to cardiac arrest. Norton’s asthma and an underlying heart condition known as hypertrophic cardiomyopathy were also identified as contributing factors.
The findings have sparked renewed scrutiny of peptide therapy, particularly as the substances gain popularity among people seeking to maintain muscle, improve their appearance and combat the effects of aging.
The investigation also examined the medical care Norton received before his death. Although Dr. Muchnicki had discussed the experimental nature of the treatment and obtained Norton’s written consent, an independent medical expert raised concerns about his recordkeeping and his handling of the request for additional medication.
The Medical Board of Australia subsequently cautioned the doctor and imposed conditions requiring further education and an audit of his clinical records. Muchnicki acknowledged shortcomings in his practice, expressed sorrow for Norton’s family and said he would stop prescribing peptides unless stronger scientific evidence supported their use.
The coroner has now urged Australia’s medicines regulator to consider tighter restrictions on experimental peptides, potentially limiting certain substances to clinical trials and other approved research settings.
Australian health authorities have warned that unapproved peptides have not undergone the regulatory assessments required to establish their safety, quality or effectiveness. Reported complications include severe allergic reactions, liver damage and other potentially serious medical problems.
For Norton, the tragic ending came after more than five decades in the entertainment industry.
Born in Sydney, he began studying judo at 11 and earned a black belt in karate by 17. His extraordinary martial arts abilities eventually opened doors in Hollywood, where he became a respected actor, stunt performer and fight coordinator.
His career included appearances in Hong Kong action films such as The Magic Crystal and City Hunter, along with work on major productions including Mad Max: Fury Road, Furiosa: A Mad Max Saga, Suicide Squad and X-Men: Dark Phoenix.
Beyond the screen, Norton helped prepare actors for physically demanding roles, working with Hollywood heavyweights including Liam Neeson, Charlie Hunnam and Tom Hardy.
He also developed a close friendship with Chuck Norris and served as a bodyguard for major entertainers, including music icon David Bowie.
Now, the circumstances surrounding his death have cast a spotlight on an increasingly controversial corner of the wellness industry, with the coroner’s findings raising a troubling question: How safe are experimental treatments being prescribed to patients when their potential risks remain largely unknown?
Leave a Reply