Founded by Dr. David Oliak and Allison Mollet, PA-C to provide personalized medical care that optimizes biology, restores vitality, and addresses what conventional medicine overlooks.
Brea, CA · Physician-Led · Practicing Together Since 2006 · In-Person Care
For twenty years, Dr. David Oliak practiced metabolic and bariatric surgery. The procedures were transformational, but they were major operations that took place only after years of significant damage had already occurred.
Conventional medicine is reactive, waiting to intervene until a formal disease sets in. It routinely overlooks obesity, hormone decline, and early biological shifts—even though addressing them proactively transforms a patient's medical, physical, and mental health.
Dr. Oliak partnered with Allison Mollet, PA-C—his clinical colleague since 2006—to build a purely proactive practice. They founded MDTW to optimize biology before disease takes hold, giving patients the medical care needed to protect their vitality and quality of life as they age.
Conventional medicine is designed to detect disease. Proactive care is built around an entirely different standard:
01
Standard lab cutoffs are set to separate disease from non-disease. Our baseline is set for optimal function—evaluating the biological shifts that occur long before a marker qualifies as an illness.
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Conventional care reacts only when labs cross into an established disease category. We intervene early—taking action when numbers show meaningful changes, while your biology is easily restored.
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When the standard is optimal health rather than disease management, the payoff is different: sustained energy, better physical performance, and protecting your quality of life as you age.
We designed our Brea practice around personal attention, practical treatment plans, and everyday convenience:
We don't rush you through ten-minute visits. We take the time to listen, review your numbers, and thoroughly explain your treatment options so you feel clear on your path forward.
Everything is handled right here: on-site blood draws, rapid fifteen-minute testosterone testing, and ongoing monitoring—saving you extra trips and separate lab visits.
You see the same experienced medical team at each visit. Having direct, consistent access to your providers makes managing your treatment seamless and convenient.
Your care is guided by experienced clinicians dedicated to metabolic health, hormone balance, and proactive wellness:
Physician & Surgeon, Medical Director
Physician Associate, Clinic Director
Physician Associate
Office Manager
Lead Medical Assistant & Phlebotomist
Medical Assistant & Phlebotomist
Medical Assistant
Because we treat the cause, not just the symptom. We're a physician-led, in-person practice in Brea that looks at how your body is actually working, down to the cellular level, and builds a plan around your biology. You get longer, unhurried visits, follow-up that continues, and access to advanced testing, hormone optimization, and peptide therapies you won't find in conventional, insurance-based care.
Your care is directed and provided by Dr. David Oliak, MD, a board-certified physician and surgeon, and our physician associates, Allison Mollet, PA-C, MSCP and Lindsay Riding, PA-C. Dr. Oliak and PA Mollet have practiced together since 2006.
We're in Brea, in the heart of Orange County. Care is in person at our practice, never templated through a screen.
We don't bill insurance, and it works in your favor: no prior authorizations, no surprise bills, and unhurried visits focused on you. We accept all major cards, HSA and FSA, and offer 0% financing on treatment packages.
Let's Begin
Meet with our clinical team in our Brea office and take the first proactive step toward optimizing your vitality and long-term health.
In-Person Care in Brea · Direct Clinician Access · Focused Appointments
Dr. David Oliak came to medicine with an engineer's mind. He studied chemical engineering at Northwestern before earning his MD, and throughout his career he's been drawn to the treatments that are clearly better for patients, even when they run ahead of conventional practice.
He saw it first in weight-loss surgery. In the 1990s and early 2000s the operation was transformational, putting type 2 diabetes into remission and reshaping patients' long-term health, yet much of mainstream medicine stayed cautious, preferring to manage disease with medications taken for life. Dr. Oliak went all in, becoming one of Orange County's first laparoscopic bariatric surgeons and performing more than 3,000 operations over the next twenty years. The field came around, and the arrival of GLP-1 medications confirmed what the surgery had shown all along: change the underlying biology, and better health follows.
That conviction is why he founded MDTW in 2023. He sees medicine facing the same choice again, between waiting for disease and managing it with lifelong prescriptions, or looking earlier, at each person's individual biology, and addressing problems at their root. To him the better path is obvious, and it's where care is heading.
His belief is personal, too. Testosterone therapy in 2023 was transformational for him, and reinforced his conviction that these treatments genuinely change lives. The same root-cause thinking led him to co-found Trinity Aesthetic Studio, where regenerative technologies prompt the body to rebuild collagen, tissue, and muscle rather than mask the surface.
Dr. Oliak is board-certified and fellowship-trained. He earned his degree in chemical engineering from Northwestern University and his MD from Washington University School of Medicine, completed his general surgery residency at Harbor-UCLA, and finished a laparoscopic bariatric surgery fellowship at Hackensack University Medical Center.
Allison Mollet, PA-C, MSCP, is a board-certified physician associate and Menopause Society Certified Practitioner who has practiced alongside Dr. Oliak in metabolic and weight-loss care since 2006. A graduate of the Yale University School of Medicine PA Program, she began her career in metabolic and bariatric surgery, where she saw firsthand how tightly weight, hormones, and long-term health are connected.
She shares Dr. Oliak's conviction that the body, given the right support, heals and regulates itself better than a drug alone can. That thinking drew her to hormone health, where she saw a real gap in care, especially for women whose perimenopause and menopause symptoms are so often dismissed. Like Dr. Oliak, her belief is personal: she has felt the benefits of hormone therapy herself, which deepened her commitment to offering it to others.
Alli also helped build the profession she practices in, as founding faculty and Program Director of the Marshall B. Ketchum University School of PA Studies, the first PA program in Orange County. She stays active in medical education through lecturing and mentorship, and belongs to the American Academy of PAs, the California Academy of PAs, the American Academy of Anti-Aging Medicine, and The Menopause Society.
Lindsay Riding, MS, PA-C, is a board-certified physician associate with over 15 years of clinical experience, primarily in emergency medicine and family practice. She earned her Master of Science in Physician Assistant Studies from Western University of Health Sciences in 2009 and holds a bachelor’s degree in Health Science with an emphasis in health promotion and disease prevention.
Passionate about patient education, wellness, and preventive medicine, Lindsay transitioned into functional and longevity medicine to better address root causes and optimize health. She has a special interest in supporting women through perimenopause and menopause and is currently pursuing certification through the Menopause Society to deepen her expertise.
Her goal is to empower patients with knowledge and personalized treatment plans that restore vitality and enhance quality of life at every stage.
