Education and care since 2003

anabolic Doc™

Introducing the Anabolic Doc App™

I've been the Anabolic Doc™ since 2003, but I've always wanted to be able to reach more men than just my patients. My YouTube channel has helped with that, but now I'm excited to announce the Anabolic Doc App, which delivers personalized health information in an actionable format. Get organized video content including a digital history and physical exam, a diagnostic and management library to reference, and exclusive access to me through my weekly shows, Man-To-Man, where you can ask me questions. Members can also purchase deeply discounted lab panels without a doctor's prescription, and they can ask me questions I'll answer in pre-recorded videos. This App will help you manage your own health as well as get the most out of visits to your doctor. If you're a healthcare provider and want to get involved, click here.

See Lab Tests


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The process
















Ongoing monitoring of your health

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Anabolic Doc™ Store

If you’re a fan of my mission to protect men on androgens, now you can spread the word with Anabolic Doc merch!

Visit the store
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Anabolic Doc™ youtube channel

Since 2018 I've shared educational health information via my Anabolic Doc YouTube channel. These videos offer general men's health information as well as content targeted to men on Testosterone Replacement Therapy and harm reduction strategies for men on anabolic steroids. I plan to continue releasing these videos - the Anabolic Doc YouTube channel isn't going anywhere!

Visit the channel
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Anabolic Doc™ Instagram

My most frequent updates are on my Instagram account: @DrThomasOConnor. Follow me to stay up-to-date!

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Testosterone replacement & Anabolic recovery Medicine® consultations

Through my practice, Testosteronology®, I provide confidential, non-judgmental and medical care and consultations. Meet a compassionate doctor who understands how steroids impact overall health. I'm the  only Board Certified Internist in the U.S. who focuses his practice on the care of men and women who have used or are using anabolic steroids. I'm also the first American Physician to address steroid use head-on and offer my expert medical services for those who are concerned about how anabolic steroids can and may have adversely affected their health.

My practice is currently full and I am not accepting new patients or consultations at this time. We have established a waiting list you can join here.

Not Available
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What makes my private practice different?

Dr. O’Connor encourages you to allow him to work with your personal doctor(s). He routinely consults with other physicians around the U.S. and abroad in the specialties of: Primary Care/Internal Medicine, Endocrinology, Urology and Fertility. Dr. O’Connor enjoys being the leader of your medical care team with one goal in mind – Your health and quality of life!

Dr. O’Connor, who has practiced in this field for over 20 years, can give you alternatives and medical advice regarding anabolic recovery and address the treatment and prevention of the following related health issues in order for patients to regain their health.

  • Erectile Dysfunction/ Sexual Issues/Infertility

  • Low Testosterone from Anabolic Steroid Induced Hypogonadism ASIH

  • Muscle Dysmorphia/Bigorexia type OCD

  • Cardiovascular Disease

  • Early Heart Failure-systolic/diastolic and Acceleration of Coronary Heart Disease

  • Kidney Disease

  • Liver Disease

  • Prostate Disease/BPH/Cancer

  • Gynecomastia

  • Baldness

  • Mood disorders – Labile Emotional State and Impulse Control

  • Intramuscular Injection Infections

  • Hematological Disease/polycythemia(thickening of the blood)

  • Strokes

  • Paradoxical Muscle Damage(weak muscles/tendons and muscle damage)

  • Irreversible Gonadal Function and Infertility

  • Impairments of Blood Pressure and Lipid Panels

  • Deep Venous Thrombosis (DVT)/Pulmonary Embolism (PE)

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America On Steroids:
A Time to Heal

A Book by Dr. Thomas O’Connor MD

There is a burgeoning epidemic of anabolic steroids use staring us in the face, while being virtually ignored by the media, policymakers, and even medicine itself. Now that steroids users have grown to 4 million Americans, Dr. O’Connor has written a book that is targeted to a wider audience in the hope that it will trigger action both within and outside the AAS community.

get a copy

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articles & Interviews

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Doctor Thomas O’Connor, MDHexagon ShapeHexagon Shape

Thomas O’Connor, MD

Dr. O'Connor is a board certified Internal Medicine physician and a Clinical Instructor of Medicine at the University of Connecticut School of Medicine. He is a published academic researcher, the creator of a personalized healthcare app:, and the author of "America on Steroids: A Time to Heal." He is well known as the “Anabolic Doc” due to his skill and experience in caring for men on TRT and anabolic steroids. His expertise in this area has been sought by the world's top media outlets, including The New York Times, Medscape,  National Geographic, Hulu, Generation Iron, Muscle and Fitness, Vice TV, and more. 

Dr. O’Connor created Testosteronology®, a sub-specialty of Internal Medicine after many years of caring for thousands of men on testosterone and anabolic steroids. No other medical specialty offers comprehensive and personalized medical services for men on androgens; Testosteronology is distinct from Endocrinology and Urology, as Testosteronology is more specific than Endocrinology, which deals with all hormones in men and women. And it is different from Urology, a surgical specialty that does not focus on the common medical aspects of how androgens effect men. These aspects include cardiovascular complications, adverse effects on red blood cell production (androgen induced erythrocytosis), psychological side effects of androgens, and other internal medicine related conditions.

Visit his YouTube Channel, @TheAnabolicDoc, for videos focused on androgen education and harm reduction. He covers specific steroids, their side effects, and the impacts  androgens have on the heart, kidneys, liver, sexual function, and other bodily systems. He also discusses TRT and provides information for patients and doctors to produce the best health outcomes possible. 

Education/Training & Additional Achievements

• American Board of Internal Medicine Certification - Since 2005

• Residency Training - Categorical Internal Medicine - University of Connecticut School of Medicine – 2005

• Professional Medical Studies – New York Medical College - 2002

• Pre Medical - Post Baccalaureate – Syracuse University

• Graduate degree in Exercise Physiology - Master's Degree - Long Island University

• Co-Auther of the 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.  

• Featured expert in documentaries by National Geographic, Hulu, Vice TV, and Generation Iron


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Dr. O'Connor's clinical leadership and his conviction to help others is making a global impact as he continues the grassroots movement on men's health. I'm privileged to be a part of it. The Anabolic Doc App is making a positive impact in the community, and he's only getting started.
- William Marshall, COO, Anabolic Doc Inc.