Dr. Raphael Kellman is the pioneer of Microbiome Medicine — he coined the term and has written 10+ books on the microbiome, gut health, and the gut-brain axis.
The microbiome is an entire community of microorganisms that live within the gastrointestinal tract, primarily in the intestines. As many as 10 to 100 trillion of these microbes live in the gut — significantly outnumbering the body's own cells, and outnumbering our genes at nearly 150 to 1.
These microorganisms are integrally entwined with all of the body's systems, influencing everything from immune function to genetic expression. Research shows that over 80% of all diseases can be traced back to the health of the gut and its microbiome.
The gut hosts trillions of bacteria that outnumber our own genes — an ecosystem involved in nearly every physiological and metabolic process, and home to a significant share of the immune system.
When this system is disrupted, the effects ripple outward: thyroid regulation weakens, inflammation rises, and symptoms appear across seemingly unrelated systems — from mood and cognition to digestion and autoimmunity.
Dr. Kellman approaches nearly every condition with a "Microbiome First" lens — treating the underlying ecosystem rather than isolated symptoms.
Every patient's path looks a little different, but here's what you can expect from your first call to your treatment plan.
You sit down with Dr. Kellman and walk through your symptoms, history, and everything you’ve already tried — no rushed 10-minute appointment.
You’re tested for what routine bloodwork misses: microbiome, thyroid, and metabolic markers that explain how you actually feel.
You get a plain-language explanation of what’s driving your symptoms — not a list of numbers, but the story behind them.
You leave with a treatment plan tailored to your body, and a care team that adjusts it with you as you improve.