OUR HISTORY
Where Natural Science Meets Historical Precision.
History
The RTN Legacy
RTN Therapy began in 1940s Czechoslovakia, where scientists discovered natural extracts that promoted regeneration and immune balance. Though clinically successful, the therapy was later lost to politics and time. Today, it’s been revived and refined through modern science to restore vitality and resilience naturally.
The Beginning (1940s–1960s)
In the early 1940s, during a time of global uncertainty, Dr. RNDr. PhMr. Bohumír Rakušan and his team at Eko Company in Czechoslovakia began researching how the body regenerates itself after trauma, illness, or stress.
Using natural compounds and biological extracts, they developed four pioneering formulations:
Retisin – supporting energy metabolism
Lyastin – aiding circulation and neural repair
Floristen – balancing mood and immune function
Silexil – improving joint flexibility and tissue resilience
Their discoveries were so successful that these preparations were used in state hospitals and medical institutions to accelerate recovery in patients suffering from infections, inflammation, and chronic fatigue.
Scientific Evolution (1970s–1990s)
As scientific tools advanced, Rakušan’s successors refined the original formulas. New variants — such as Imuregen and Juvenil — were introduced, representing a continuation of the RTN philosophy:
heal the system, not just the symptom.
RTN Therapy became a respected part of Central European regenerative medicine, known for its natural biochemical profile and lack of synthetic interference.
Researchers observed that RTN formulations supported faster cell renewal, improved post-surgical recovery, and stabilized immune activity.
The Dormant Years (2000–2015)
Following the political and economic transitions in Eastern Europe, the Eko company’s research temporarily halted.
However, the knowledge was preserved by scientists and practitioners who continued using RTN-based principles in private and clinical settings.
During this period, archived materials, formulas, and laboratory notebooks were carefully digitized — laying the foundation for a new generation of RTN research.
Modern Renewal (2018–Present)
In 2018, RTN Therapeutics s.r.o. reactivated the program, determined to bring these historical discoveries into the era of precision wellness and data-driven science.
Every formula was re-evaluated for purity, standardized extraction, and verified safety, while maintaining its biological integrity.
The reInvented Immunology Study (RTN-RII) was then launched — a global research initiative designed to:
Connect participants, practitioners, and researchers in one open database
Measure how natural biochemical support influences longevity and immune balance
Use modern data analytics and AI to reinterpret historical findings
Public Access (2020s and Beyond)
RTN Therapy now combines traditional biological extracts with AI-enhanced knowledge to create a transparent, accessible ecosystem for natural therapy.
Through the RTN GPT Assistant, participants can:
Learn about ingredients and study results
Track their personalized data (under privacy protection)
Receive tailored information on the RTN program’s impact
The reInvented Immunology Study continues to expand, building a living database of outcomes — empowering the next generation of preventive science.
ROBBERY
AI Services We Provide
To Our Clients
1948 - From pioneer to property of the state
The company was restructured during the second wave of nationalization by the communists, and brought under government control. The RTN project continues under SPOFA as state Factory 15 Eko. Dr. Rakušan stay as the project leader since the RTN is ready for mass production.
50s - Providing the proven
The RTN transitions into a new phase with the founding of the Institute for Medicinal Plant Research. Even as the state restructured the pharmaceutical sector, the original RTN team continue in their work.
60s - When ideas saved lives
RTN preparations were approved for industrial production and intramuscular use. Retisin, Lyastin, Floristen, and Silexil passed clinical trials and entered mass manufacturing as state-approved, safe medicines used nationwide.
70s - How we killed our own legacy
RTN preparations are quietly shelved, despite clinical success, public support, and physician advocacy. A new wave of pharmacology prefer synthetics - cleaner on paper, simpler to patent, easier to mass-produce. Standardization wins. We all loses.
80s - Echoes
After Retisin disappeared from hospitals, its creators, Dr. Bedřich Doležel and MUDr. Gabriel Urbánek, preserved its spirit through new tissue-based research at the University of Chemistry and Technology in Prague. Their work led to Juvenil, later known as Imuregen, a civilian successor to RTN. The Velvet Revolution of 1989 brought freedom—and quietly marked the end of RTN’s original era.
New Age
From Heritage to Innovation
Building on the past, shaping the future of wellness
90s - The Derivatives in commerce
Dr. Bedřich Doležel stayed at the university, while Jednota Hronov moved into private hands and neared bankruptcy. Two younger colleagues founded Juwima, later Juwital/Juwim. Around the same time, Bob Rakušan tried to revive his father’s RTN formulas, but only Juwim/Imuregen survived. The former State Glass Research Institute, once producing Imuregen under Dr. Doležel, used Juwim in Preventan and later launched ProteQuine. All these spin-offs carried Dr. Rakušan’s legacy.
00s - In the Orbit of Giants
Bob Rakušan, continued experimental work on semi-original derivatives through testing in collaboration with world-renowned chemist Prof. RNDr. Antonín Holý, DrSc., at the IOCB Prague. But the idea remained just that, an idea, until it faded along with Dr. Holý’s passing.
10s - The turn toward longevity
We assemble a new multidisciplinary international team - technologists, doctors and scientists with one goal, validate historical information and transfer them regarding the requirements of the modern world.
Our Journey
From a Legacy of Discovery to a Modern Era of Longevity and Wellness
1940s Origins
Czechoslovak injectable tissue extracts with remarkable regenerative and immune-modulating effects.
Clinical Success
Used in over 12,000 documented cases - treating cancer, gangrene, arthritis, and chronic infections.
The Disappearance
Despite strong clinical outcomes, the therapies vanished - buried by politics, dogma, and complexity.
Modern Revival
Reborn as scientifically validated dietary supplements for longevity, resilience, and cellular health.
our Founders
Our Amazing Founders
Innovation Born from Compassion and Curiosity
1919 - EKO
EKO was founded in Prague by Eduard Kolář as a chemical laboratory. He was joined by Dr. Jindřich Křepelka, returning from Harvard. In 1931, upon being named full professor, Křepelka selling his share to Bohumír Rakušan, his assistant at Charles University.
1935 - RTN
a visionary pharmacist. The company was still named "Eko" referring to the name of the founder and embracing the timelessness identity of the company. The death of his brother Jan from leukemia sparked the RTN, a visionary program in tissue-based immunotherapy.
40s - EXPANSION
Numerous advanced RTN compounds have been developed (RTN33, RTN75, RTN102, RTN112, RTN114, RTN118, RTN119, RTN121, RTN122(k), RTN134, RTN140) and registered trademarks of LYASTIN, RETISIN, and SILEXIL. Annual revenue is nearing $40 million USD.
Inside the World of RTN
Step inside our visual story — from lab discoveries and fieldwork to real moments of innovation. Each image reflects the passion, precision, and people behind RTN’s mission to redefine natural therapeutics.
