I created Testosteronology®, a sub-specialty of internal medicine after many years of caring for thousands of men on testosterone and anabolic steroids.

Dr. Thomas O'Connor
The Anabolic Doc

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I created Testosteronology®, a sub-specialty of internal medicine after many years of caring for thousands of men on testosterone and anabolic steroids.

Dr. Thomas O'Connor
The Anabolic Doc

Take Control of Your Health

Get Answers | Assess & Maintain Your Health | Find a Testosteronologist™

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ADHD Medications & Heart Disease - How To Protect

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HCG: How To Use

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How To Use TRT Clinics

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Join live video meetings to ask Dr. O’Connor your questions
Every other week, join live group meetings where you can ask Dr. O your health questions. Get answers and learn from others who want to maximize their health and stay strong and healthy!

Find a Certified Testosteronologist™

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Sick of the one size fits all approach of big box TRT clinics? Certified testosteronologists have completed Dr. O'Connor's training program and know the importance of individualized treatment. You don't need to be an app subscriber, find a testosteronologist™ today!

Testosteronology® Forum

Member's only discussion forum
Subscribers get access to our members-only forums. Ask questions, get answers, and learn from other subscribers - many of whom have similar goals or are facing the same challenges as you!

Ask Dr. O'Connor GPT

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Get answers to your questions from our custom AI model, designed to answer based only on information Dr. O'Connor has discussed in his videos. Dr. O GPT synthesizes the information from hundreds of videos to provide customized answers to your questions.

Assess & Maintain Your Health

ABCD'S™ Health Tool

Personalized health assessment tool based on your blood markers & other metrics
Track, monitor, and assess your key health metrics based on Dr. O'Connor's ABCD'S™ methodology. When you enter your blood markers, you'll get a color-coded graph to help you understand what metrics need to be improved, and resources explaining how to improve them!

Discount Blood Tests

Deep discounts on packages of labs Dr. O'Connor uses in his practice
We've partnered with an independent testing provider to offer convenient, affordable blood testing, available in almost all U.S. states. You don't need to be a subscriber to access these tests, just click below, order a package, and head to a local blood draw site to get tested!

Executive History & Physical

Learn what health concerns to focus on based on your personal and family history
Many private practice physicians offer an in-depth "executive history and physical" that other doctors simply don't have the time for. Now you can access a similar analysis in a digital, self-serve format.

Health To-Do

Keep track of everything. Your next blood draw, injection, cancer screening, & more
Schedule everything related to your health in a central location, accessible any time you log in. Simply choose an action from our drop-down menu, select a date, and keep track of everything!

About Dr. O'Connor

Since 2005, Dr. O'Connor has been a board certified internal medicine physician and clinic instructor of medicine at the University of Connecticut School of Medicine. He is a published academic researcher and co-authored the world's largest published anabolic androgenic steroid survey. He's the author of America on Steroids: A Time to Heal, and 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 extensively by top media outlets including Dr. Phil, GQ Magazine, Hulu, Vice TV, National Geographic, Generation Iron, Muscular Development Magazine, Muscle and Fitness, and The New York Times. He is regularly featured in private film productions worldwide. His YouTube channel Anabolic Doc continues to grow, with hundreds of thousands of subscribes. Dr. O'Connor has produced over 400 educational videos on anabolic steroids with a focus on harm reduction as men and women throughout the world have trusted him as their premier medical expert on anabolic steroids and testosterone replacement therapy. Now, Dr. O'Connor is 100% focused on bringing his Testosteronology® specialty and training to the next generation of Testosteronologists™ to the world marketplace - so that every man and woman may access everything he has created, to Stay Strong & Healthy!

Customer Reviews

Aaron McCarthy
★★★★★

This is a great practice with an extremely experienced and knowledgable doctor. Even better than the doc is his staff. Wendy and Kim are sweethearts and amazing to work with. They provide a far better level of care than I've experienced anywhere else.

Jeff Day
★★★★★

I have been following Doctor Thomas O'Connor for quite a while. I have been under his care and I want to tell you that you will not find a more honest and caring doctor or person. His passion and knowledge are unrivaled. I am also going to let you know that Wendy is my Hero. Wendy I want to tell you thank you for all that you do words can express how much these two have helped me. I am living my best life because of both of you. I look forward to a long prosperous relationship.

Quentin Dixon
★★★★★

First met him a few years ago for a consultation, decided to become a patient about a year ago. Great guy, his competence and passion for what he does is unequivocal. Additionally, his staff is friendly, competent and responsive. Would give all of them 6 stars if I could.