About The Longevity Clinic
No one should fear aging. You should look forward to it.
Our mission is simple: help you live longer and better, with energy, clarity, and joy at every stage of life. Traditional medicine waits for problems. We get ahead of them. Using advanced biomarker testing and concierge-level care, we build a plan around your own biology, today and for decades to come.
Health is more than the absence of disease. It’s energy, resilience, clarity of mind, and the confidence to show up fully in every area of life. Every patient’s journey is different, so we look at the full picture, your biology, lifestyle, and goals, then build a plan around you that evolves as you do.
Meet The Team
The people behind your plan.
Co-Founder & Medical Director
Dr. Mohammad Jarbou, MD
Board-certified in Internal Medicine, Pulmonary Disease, and Sleep Medicine.
With over 20 years diagnosing and treating respiratory and critical care conditions, Dr. Jarbou has built a reputation for exceptional patient care grounded in the latest advances in medical science.
Dr. Mohammad Jarbou, MD, earned his medical degree from Damascus University Medical School, completed his residency in internal medicine at the University of Missouri in Columbia, and completed his fellowship at Washington University in St. Louis. He holds a master’s degree in clinical informatics and is the author of Before the Alarm.
He co-founded The Longevity Clinic with Marmar Atallah to bridge the gap between traditional medicine and modern performance science. His focus is on early detection, treatment plans built around each patient’s own biology, and sustainable lifestyle change.
“The crisis is sudden. The process is not.”
Outside the clinic, he enjoys hiking, traveling, and exploring wellness practices that complement his passion for both modern medicine and preventive health.
Co-Founder & Master Coach
Marmar Atallah
An experienced personal trainer and nutritionist with 15 years of coaching behind him, Marmar has guided more than 500 clients through fat loss, muscle building, and improving metabolic health.
He also brings a decade of experience as a supplements consultant and nutrition counselor, with well-rounded guidance on diet, supplementation, and sustainable health practices.
Like many of his clients, Marmar has faced his own setbacks. During the pandemic, the stress of gym closures, running a business, and becoming a father led to the “Dad Bod” he’d always worked to avoid.
His approach is rooted in that experience. He understands what it’s like to balance fitness with real life, and his mission is to give clients the tools and mindset to maintain lasting health, not just hit one goal.
Operations Director
Tammy Backman
A passionate health and fitness advocate who spent 13 years as a medical practice manager before focusing on helping individuals, especially perimenopausal and menopausal women, embrace healthy aging. She’s dedicated to changing negative mindsets around aging and helping others take control of their health journey.
Having navigated her own menopause transition, Tammy speaks from personal experience as much as professional passion. Hormone replacement therapy played a pivotal role in helping her feel like herself again, and shifting her workouts from cardio-focused to strength-training-focused made an equally significant difference in how she felt, moved, and aged. That firsthand experience fuels her belief that women don’t have to simply endure menopause. With the right tools, they can move through it feeling stronger than before.
Tammy is a wife, mother to four grown children, and grandmother, a role that has only deepened her passion for promoting health across generations.
What Sets Us Apart
Concierge medicine, not cookie-cutter care.
At The Longevity Clinic, you won’t get cookie-cutter care. Everything we do is designed around you: your data, your lifestyle, and your goals. We invest the time to understand your unique health story, then deliver strategies that are science-backed, sustainable, and built around your actual biology, not a template.
Our concierge model means direct access to a highly qualified team that knows you personally, not just your chart.
Who This Is For
We're not here to simply extend years.
We're here to make them count.
With the right strategy, science, and support, aging becomes not a limitation, but an opportunity to live with more energy, purpose, and joy than ever before. We prioritize your time, money, and energy by eliminating guesswork and offering clear, actionable insight from qualified experts with proven track records.
- Avoid wasting money on fads, gurus, and unqualified coaches.
- Eliminate uncertainty about where to start.
- Maintain momentum with a comprehensive, step-by-step plan.
- Work with one cohesive team led by a board-certified physician, instead of piecing together advice from scattered, and sometimes dubious, sources.
Ready to see what's possible?
Book a free Discovery Call and let’s talk through where you are and what a plan built around your own biology could look like.