Dr. Sean Breen

Anti-Aging, Functional and Regenerative Medicine Specialist

Dr. Sean Breen is a graduate of the New York College of Osteopathic Medicine in Old Westbury, NY. Following medical school he was awarded a United States Navy Health Professions Scholarship and completed his post-graduate training at the prestigious Naval Medical Center located in San Diego, California. During his 9-year career as a Navy medical officer, he spent 4 years as a battalion surgeon with 1st Marine Division at Camp Pendleton, California.

In 2003, he deployed to Iraq in support of Operation Iraqi Freedom (OIF-1) as the battalion surgeon for 1st Battalion 4th Marines. He was in charge of 65 Navy Corpsman and responsible for the health of over 1,000 United States Marines. During his 9-month deployment, he was embedded with the Marines on the front lines directly in combat.

He was awarded a Navy and Marine Corps Achievement Medal with Valor for his actions on April 8, 2003, taking care of a fallen Marine in a section in Baghdad called Saddam City. Upon returning from combat in September 2003, he continued to serve with the Marine Corps as the battalion surgeon for 1st Combat Engineer Battalion and was promoted to be the 11th Marines Regimental Surgeon.

He was honorably discharged from the Navy in 2006 after being promoted to the rank of Lieutenant Commander.

Following his decorated military career, Dr. Breen shifted his focus to preventative medicine. Already proficient in osteopathic and CranioSacral manipulation, he went on to earn a degree in Medical Acupuncture from the Helms Medical Institute at the David Geffen UCLA School of Medicine. He completed the advanced fellowship with the American Academy of Anti-Aging and earned his board certification in Anti-Aging, Functional and Regenerative Medicine.

In addition, he became an expert in Bioidentical Hormone Therapy after training with Dr. Neal Rouzier, who is world renowned for his work and research in natural hormone replacement therapy. He is currently completing a Masters Degree in Metabolic and Nutritional Medicine at the University of South Florida medical school.

Dr. Breen is the founder and medical director for Dr. Sean Breen, PC. His clinic is the premier medical clinic in preventative, functional and regenerative medicine in Southern California.

His goal is to restore optimal health and prevent disease before it becomes symptomatic. He has developed an annual health plan that walks patients step-by-step through the healing process over an entire year.

Each patient receives a customized health plan designed to restore the body’s natural hormones to levels they had when they were 20 years old.

In addition, each patient receives a customized nutrition plan based on their specific physiology, biochemistry, and nutritional status. Lastly, he uses the latest scientific technology based on peer reviewed medical literature to help patients break free of the current medical model which is treating symptoms with drugs while failing to address the underlying or root cause of the disease.

In addition, Dr. Breen played Division-1A baseball as a pitcher for Iona College located in New Rochelle, NY (picture). He was a First Team academic All-American in his junior and senior years and was a NY State College All-Star in 1996. He was also named team captain in his senior year. His passion for athletics continues and he has been an active member of the CrossFit community since 2009. He is passionate about helping athletes achieve peak performance by avoiding overtraining and identifying injury depletion.

Personally, Dr. Breen has been married Erin since 2009 and has three children (Jack 7, Landon 4, and Danielle born October 29, 2017) and currently resides in the city of San Clemente, CA.




Zachary Lott, NP-BC

Anti-Aging, Functional and Regenerative Medicine Specialist

Zachary Lott, NP, is board-certified as a Nurse Practitioner by the American Nurses Credentialing Center. He holds a Master of Science Degree in Nursing and a Nurse Practitioner Master’s Certificate from California State University, Long Beach. He received his training at the Keck Medical Center of USC and the MemorialCare Long Beach Medical Center. Zachary’s post-graduate education includes fellowship in functional, anti-aging, and regenerative medicine with Dr. Breen. He was trained in advanced bio-identical hormone replacement therapy by Neal Rouzier, M.D., and holds certification by The Academy of Preventative and Innovative Medicine. He is trained in advanced prevention of heart attack, stroke, and diabetes. He is trained and certified as a provider of the BaleDoneen Method and has been trained in Alzheimer’s disease prevention with the Bredesen Protocol. Zachary also has a dedication to improving sexual health and has obtained certifications in the use of low-intensity extracorporeal shock-wave therapy (GAINSWave), platelet-rich plasma (PRP), and stem-cell treatments. Zachary has a medical background in adult critical care, working at the bedside of the sickest and most unstable patients in the hospital. He was motivated by his critical care experience to find a treatment approach that aims at preventing any person under his care from ever becoming as sick as the patients he saw in the intensive care unit.

​Zachary prevents and treats disease with an integrative approach to holistic care. He understands the importance of diet, exercise, sleep, and hormones in the role of the aging process and in the prevention of disease. Through his approach to wellness, he individualizes treatment to each person under his care with the use of specialized diagnostics, lifestyle management, and bio-identical hormone replacement therapy. Along with helping people achieve their individual health goals, he aims to give them back their health and their life.

Zachary is a decorated Marine Corps veteran who served his time in the Fleet Marine Force with Bravo Company, 1st Battalion, 4th Marine Regiment. Zachary was awarded the Bronze Star Medal for valor for his actions in combat in 2003 during Operation Iraqi Freedom. His military career also included two overseas deployments, numerous personal and unit awards, and completion of multiple specialized training courses.

ZIn his personal life, Zachary is a father and has a beautiful daughter named Madelyn. The two enjoy hiking, going on nature adventures, learning about animals, playing at Disneyland, dancing, swimming, and princess tea parties. When he is not with his daughter, he can be found in the weight room or food-prepping. He has a passion for snowboarding, the outdoors, learning, travel, and spontaneous adventure.