Thomas O'Connor, MD - Founder And Chief
I created Testosteronology®, a sub-specialty of Internal Medicine developed after many years of caring for thousands of men and women using testosterone and anabolic steroids. No other medical discipline provides the same comprehensive, personalized medical oversight for individuals on androgens. Testosteronology® stands apart from Endocrinology and Urology: it is more focused than Endocrinology, which addresses all hormones broadly, and distinct from Urology, a surgical specialty that does not concentrate on the complex medical consequences of androgen use.
Testosteronology® centers on the real-world physiological and psychological impacts of androgens—including cardiovascular complications, androgen-induced erythrocytosis, mood and behavioral changes, fertility considerations, and the full spectrum of Internal Medicine–related conditions arising from therapeutic or non-therapeutic androgen exposure.
As the field evolved, I established the Testosteronology Society™, the professional organization dedicated to advancing this specialty and supporting clinicians who practice within it. The Society™ formalizes the discipline, sets clinical standards, drives new research, provides professional development, and ensures that Testosteronology® remains the leading authority on androgen-related medical care. As its founder and chief in charge, I am committed to nurturing a global community of clinicians who uphold the highest principles of evidence-based, patient-centered androgen medicine.
ACCOLADES
- American Board of Internal Medicine Certification - Since 2005
- Clinical Instructor/Teaching Physician-Department of Medicine-University of Connecticut School of Medicine - Since 2005
- Residency Training – University of Connecticut School of Medicine – Completed 2005
- Professional Medical Studies – New York Medical College - Completed 2002
- Pre Medical - Post Baccalaureate – Syracuse University
- Graduate degree in Exercise Physiology - Master's Degree - Long Island University
ADDITIONAL ACHIEVEMENTS
- Creator and CEO of Testosteronology® a new specialty of medicine - educational and professional training programs for healthcare providers specializing in caring for men and women who have decided to use androgens
- Creator of Testosteronologist® - the professional title associated with Testosteronology®. View the world directory of licensed Testosteronologists® or become a Testosteronologist®
- Creator of Anabolic Recovery Medicine® & A.R.M.®. Under the auspices of Testosteronology® and administered through Testosteronologists®- specialized medical services specifically for men and women who are suffering from the adverse effects of anabolic androgenic steroids and other performance-enhancing substances PEDs
- Creator of Anabolic Doc® & CEO of Anabolic Doc, Inc
- Author of “Anabolic Doc” column in Muscular Development magazine 2009-2020 and co-host of "Ask the Anabolic Doc" podcast series
- Contributing Author to Bill Llewellyn’s Anabolics 11th Edition
- Author – “America on Steroids – A Time to Heal”, 2017
- Co-Author of the world's largest anabolic steroid survey, peer-reviewed journal: Characteristics and Attitudes of Men Using Anabolic Androgenic Steroids (AAS): A Survey of 2385 Men; American Journal of Men's Health, November-December 1-12 2020
- YouTube channel "Anabolic Doc" for anabolic steroid education
- Featured anabolic steroid expert: Muscle and Fitness, New York Times, New York Daily News
- Featured expert for Al Jazeera English - Fault Lines, GQ Magazine, Dr Phil, HULU, National Geographic, Vice TV, Medscape, Insider, New York Times, Daily News, Voice of America, and Generation Iron
- American Powerlifting Association 2012, 505lb bench press at 198lb weight class
Omar Hajmousa, PharmD - Executive Director, Medical Affairs & Clinical Strategy
I joined Testosteronology® as a Doctor of Pharmacy, graduating with my PharmD from The Ohio State University, with the goal of deepening my expertise in the systemic effects of testosterone and its clinical role in treatment, prevention, and health optimization. My background in pharmacology and complex medication management gives me a unique lens through which to assess androgen therapy, including its mechanisms, benefits, risks, and the critical nuances that influence patient outcomes.
Inspired by Dr. Thomas O’Connor’s pioneering work, clinical philosophy, and unwavering leadership in androgen care and harm reduction, I have committed my career to advancing the field he founded. Dr. O’Connor’s creation of Testosteronology®, and later the Testosteronology Society™, where he serves as Founder and Chief, has established a new standard of excellence for managing the medical, psychological, and physiological consequences of androgen use. His mentorship and vision continue to shape my professional development and guide my contributions to the Society™.
Appointed by Dr. O’Connor to serve within the Testosteronology Society™, my mission is to help expand the global reach of this specialty while empowering healthcare providers with the knowledge, tools, and evidence-based practices necessary to deliver exceptional androgen-related care. I work to support the Society’s initiatives in education, clinical collaboration, research development, and professional training, ensuring that current and future clinicians uphold the highest standards of patient-centered, ethically grounded hormone and androgen management.
Through this work, I am dedicated to advancing Dr. O’Connor’s legacy and helping men and women worldwide access safer, more informed, and more compassionate androgen care rooted in the principles of Testosteronology®.