About Your Physician & Chief Longevity Architect
Dr. Subhra "Sam" Banerjee is a board-certified gastroenterologist and longevity-focused physician who brings over 15 years of clinical experience. Driven by a desire to go beyond symptom management and fragmented care of today’s conventional healthcare, he started gut focused longevity approach, emphasizing prevention, root cause resolution, and long-term health optimization. He founded LongevIQ GI to offer discerning individuals and families something rarely found in healthcare: proactive, personalized, high-resolution insight into how to live longer — and better.
His approach blends advanced diagnostics with a deep understanding of gut health, inflammation, and metabolic function — the true drivers of aging and chronic disease. Through virtual, physician-led care, he helps clients optimize their biology using the latest in microbiome science, genomic testing, imaging, and preventive strategies that are tailored, discreet, and scientifically grounded.
After completing a rigorous three-year fellowship in gastroenterology and hepatology at the prestigious Mount Sinai Health System in New York City, he has built a distinguished career in both clinical care and research. With a strong passion for gut microbiome science and colon cancer prevention, he has dedicated his career to advancing early detection, educating patients, and promoting proactive health strategies. His expertise in evolving microbiome science is pivotal in understanding its profound impact on longevity and overall health.
An elected Fellow of the American College of Physicians (ACP) and the American College of Gastroenterology (ACG), he is recognized by his peers for his commitment to excellence in both patient care and evidence-based practice. In addition to his clinical practice, he has over six years of experience in clinical research, including involvement in phase III clinical trials and the innovative use of artificial intelligence (AI) to enhance diagnostic and treatment strategies within gastroenterology. He has published peer-reviewed research indexed in PubMed.
.avif)
Trust
Experience
Compassion
A Foundation Built on Clinical Excellence
A career shaped by rigorous training, national recognition, and a commitment to evidence-based longevity medicine.







From the
Founder's Desk
The Science of Longevity is Gut-Centric
In recent years, the science of aging and gut microbiome health has converged in ways that are clinically consequential. We now understand that specific microbial signatures drive inflammation, metabolic function, and healthspan at a mechanistic level. These are not ancillary factors; they are the upstream regulators of how you age. At LongevIQ GI, we translate this evidence into precise, personalized protocols—not to manage disease after it emerges, but to intervene at the biological inflection points that determine your trajectory.
From Observation to Mechanism
I believe medicine must reflect the reality of human biology across time. My travels through the Mediterranean and the world's Blue Zones— from the olive-covered hills of Crete and the mountain villages of Italy to the coastal communities of the Nicoya Peninsula in Costa Rica—provided me with a critical observational foundation. What I witnessed firsthand—specific dietary patterns, environmental rhythms, and social structures—weren't cultural curiosities. They were biological signals with measurable downstream effects: the near-absence of ultra-processed inputs and the fiber density of traditional Mediterranean diets directly shapes microbial composition and the production of short-chain fatty acids that regulate inflammation. Advanced microbiome sequencing now explains those signals mechanistically. At LongevIQ GI, we integrate this real-world framework with the highest level of clinical science to build your biological strategy.
A Fiduciary Model of Care
At LongevIQ GI, the clinical model is built on precision, not volume. We begin with comprehensive diagnostics—gut microbiome sequencing, epigenetic age analysis, and advanced cardiometabolic profiling—to establish your baseline. Every intervention is evidence-anchored. We take a conservative, evidence-led approach to nutraceuticals, deploying them only where the clinical data is unambiguous. Our goal is not a protocol you follow — it is a biological understanding of your own system that compounds over time.
Your Physician and Advocate
My role is to function as both your physician and your clinical advocate. I bring the diagnostic rigor of a board-certified gastroenterologist with sixteen years of clinical experience, and the longitudinal perspective of a researcher who has studied how environment, habit, and biology interact across decades and cultures. Whether you are proactively investing in the next thirty years or navigating a critical transition in your health, what you will receive at LongevIQ GI is clinical precision applied with the full picture of who you are and how you live.
What We Do
Gut Microbiome Expertise.
Our clients experience measurable improvements in metabolic resilience, body composition, cognitive function, and biological age — outcomes we track with precision over time.
Depending on your goals, we offer several levels of engagement — from foundational health optimization to comprehensive longevity programs that include advanced imaging, multi-cancer screening, and continuous biometric monitoring. We offer a modern, medically advanced path to longevity that goes far beyond annual checkups or fragmented wellness advice.
Our practice focuses on identifying and correcting the silent drivers of aging — inflammation, metabolic dysfunction, gut imbalance, and cellular decline — using the most comprehensive diagnostic tools available. From deep-dive gut analysis to full-body MRI scans, from genomic testing to advanced biomarker profiling — we uncover the full picture of your biology to build a personalized strategy for extending your healthspan, not just your lifespan.
Our Philosophy
Modern Longevity Medicine
Our Philosophy is rooted in the timeless wisdom of the Delphic Maxims — a set of ancient Greek precepts inscribed at the entrance of the Temple of Apollo at Delphi , preserved through millennia and traditionally attributed to the Seven Sages of Greece — these three guiding principles bring an enduring ethos of self knowledge, balance and disciplined humility into our modern practice of longevity medicine.
Know Thyself
We partner with each client to deeply understand their biology, lifestyle, aspirations and boundaries. By fostering self‑awareness, we uncover unique opportunities for enhancement and resilience, anchored in evidence and individual context.

Nothing in Excess
Optimal wellness is not about extremes but sustainable balance. Our philosophy emphasizes precision, measured interventions, and disciplined stewardship of physiology. We guide clients toward a state of durable vitality, rather than fleeting peaks of performance.

Certainty Brings Ruin
In the ever-evolving field of longevity, scientific understanding continues to grow and shift. With this in mind, it's important to approach any emerging therapies with thoughtful curiosity rather than absolute certainty. Our approach is grounded in informed risk management, clear communication, and flexible planning. By setting realistic expectations and focusing on data-driven insights, we aim to offer a service rooted in trust, transparency, and meaningful progress.

Our Signature
5-Step Longevity Process
Discovery & Intake
We begin with an in-depth review of your health history, lifestyle, and personal goals. This is your chance to share your vision of health and future endeavors, whether you’re cheering from the sidelines at your grandchild’s soccer game, still rallying on the tennis court in your eighties, or exploring exotic destinations deep into your senior years — We help you reclaim the most precious assets—time and well‑being—so you live not just longer, but fuller.
Deep Diagnostics
We deploy a suite of world-class diagnostics, including:
- Advanced biomarker panels
- Gut microbiome & intestinal permeability testing
- Advanced epigenetic testing
- Whole-body and Brain MRI
- Multicancer early detection blood test
Testing is arranged discreetly through our partner network or in the comfort of your home.
LongevIQ GI Intelligence Report™
We synthesize your results into a personalized longevity blueprint — highlighting key risks, biological age, gut-brain health status, and opportunities for optimization. Delivered via a written report and virtual consult.
Precision Protocol
You receive a custom health optimization plan, which may include:
- Lifestyle interventions
- Nutrition & gut support
- Optional supplement regimen
- Optional prescriptions & therapeutic protocols
All designed with a longevity-first lens, backed by clinical science.
Ongoing Optimization
Our clients receive continuous support, annual testing, protocol adjustments, and direct access to your physician. Your health evolves — and so does your care.