Dr. Thomas O'Connor is the first American board-certified internist to focus his medical practice specifically on the health and recovery of individuals who use anabolic steroids and androgens.
He founded Testosteronology®, a dedicated subspecialty of internal medicine that addresses steroid-induced hypogonadism and associated cardiovascular and metabolic concerns.
Dr. O'Connor has over 20 years of experience treating men and women with a history of anabolic steroid, SARM, and PED use. He has been a board-certified MD since 2005 and provides guidance on harm reduction methodologies.
Dr. O'Connor is a clinical instructor at the University of Connecticut School of Medicine and has been featured in various media publications, including Generation Iron, Dr. Phil, National Geographic, The New York Times, Muscle and Fitness, and others.
Dr. O'Connor also co-authored the largest survey on anabolic steroid use, which involved 2,385 men and was published in the peer-reviewed American Journal of Men’s Health. He holds active medical licenses in Connecticut and Florida.
LGD-4033 (Ligandrol/VK5211/Anabolicum) is a potent selective androgen receptor modulator (SARM) commonly used by weightlifters for bulking purposes due to its positive effects on muscle strength and hypertrophy (1). Ligandrol and other SARMs show promise for the potential treatment of cachexia and sarcopenia due to their anabolic effects and tissue selectivity (2). LGD-4033 strongly binds to […]
Anavar (oxandrolone) was created in 1962 to increase lean muscle in patients suffering from cachexia (muscle wasting). However, it was not long before Anavar was used in bodybuilding due to its anabolic (muscle-building) and lipolytic (fat-burning) properties. Anavar became utilized as a cutting steroid at the expense of some users experiencing cardiotoxicity (heart toxicity) and […]
Selective androgen receptor modulators (SARMs) are not approved by the FDA, and thus, they are not considered safe at this time. Despite a lack of approval, SARMs are becoming increasingly utilized in bodybuilding circles due to a misconception of them being safe alternatives to anabolic steroids. Thus, just like with steroids, there are SARMs with […]
RAD-140 (Testolone, Testalone, EP0062, vosilasarm) is one of the most commonly administered SARMs due to its significant anabolic, lipolytic, and strength-enhancing properties. However, users should exercise caution when purchasing RAD-140. A limited investigation confirmed that only 52% of SARMs being sold online actually contain the SARM compound as specified on the label (Van Wagoner et […]
Selective androgen receptor modulators (SARMs) are being reviewed as a possible treatment for cachexia due to their anabolic effects (1, 2, 3). However, there are no official dosing or cycle protocols issued by pharmaceutical authorities (4). This is due to SARMs not being approved by the FDA (5). This guide will detail the common dosages […]
