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For those who have tried “everything” when it comes to gut health, functional medicine is a welcome solution.
Dr. Kellman is nationally recognized as a pioneer of Microbiome Medicine and has spent his career uncovering how gut health influences every aspect of the body. It impacts your digestion, immunity, mood, metabolism, and brain function. His clinic in New York City helps patients find answers to chronic gut issues that conventional medicine often overlooks.
Let’s get to the root.
Gastrointestinal (GI) conditions encompass a wide range of disorders that affect the stomach, intestines, and overall digestive system. It’s estimated that over 10% of the U.S. population suffers from GI issues, and among adults over 65, that number jumps to 35%. Research shows that nearly two-thirds of Americans experience at least one GI symptom every week, and GI-related problems account for nearly 100 million ambulatory visits annually.
Despite these high numbers, many people in New York City struggle for years without real answers. Traditional medicine often focuses on suppressing symptoms—using medications like antacids, laxatives, or antibiotics—without addressing the underlying imbalance. Dr. Kellman takes a different approach, looking deeper into the microbiome, diet, and systemic factors that contribute to gut dysfunction.
At our New York City practice, patients come from around the world seeking relief from chronic digestive and inflammatory issues. Common conditions treated include:
Irritable Bowel Syndrome is characterized by bloating, constipation, diarrhea, and abdominal pain. It often stems from disrupted gut flora and heightened stress responses.
Small Intestinal Bacterial Overgrowth occurs when excess bacteria accumulate in the small intestine, leading to bloating, gas, and nutrient malabsorption.
Gastroesophageal Reflux Disease is more than just heartburn—it can indicate an imbalance in stomach acid and overall digestive function.
Gluten and Lactose Intolerance are sensitivities that cause discomfort, fatigue, and inflammation after consuming certain foods.
Crohn’s Disease and Ulcerative Colitis are chronic inflammatory bowel diseases that require a comprehensive, personalized strategy for symptom control and long-term remission.
Leaky Gut Syndrome occurs when the intestinal lining becomes too permeable, allowing toxins and undigested food particles to enter the bloodstream and trigger systemic inflammation and autoimmune reactions.
Dr. Kellman’s practice integrates conventional diagnostics with advanced microbiome testing to pinpoint root causes, not just manage symptoms.
Modern science confirms what Dr. Kellman has long taught: the gut and brain are deeply interconnected through the gut-brain axis. This communication pathway links the central nervous system with the enteric nervous system, allowing your gut microbiota to influence mood, focus, and emotional well-being.
Approximately 90% of serotonin—the body’s “feel-good” neurotransmitter—is produced in the gut. When your microbiome is imbalanced, it can manifest as anxiety, depression, brain fog, or fatigue. Conversely, chronic stress can disrupt digestion and alter the composition of gut bacteria.
At the Kellman Center, treatment often begins with restoring balance to this vital connection. By healing the gut, patients frequently experience clearer thinking, improved mood, and renewed vitality—proof that digestive health is the foundation for mental and emotional wellness.
Traditional gastroenterology specialists focus heavily on pharmacological interventions: acid suppressants, antibiotics, anti-inflammatories, or biologic drugs. While these can be helpful for acute symptoms, they rarely restore optimal gut function. In fact, long-term medication use may disrupt the microbiome further, perpetuating inflammation and digestive distress.
Dr. Kellman’s integrative approach recognizes that each patient’s gut microbiome is as unique as their fingerprint. Rather than applying a “one-size-fits-all” solution, he customizes protocols that target the root imbalances—whether microbial, inflammatory, hormonal, or neurological—that underlie chronic gut conditions.
Patients often come to Dr. Kellman after seeing multiple specialists without lasting relief. His approach provides something they haven’t experienced before: a deep, scientific understanding of their body’s systems working together—and a practical roadmap to genuine recovery.
Dr. Kellman and his team use advanced diagnostics and personalized care to create comprehensive gut restoration plans. Each program is tailored to the individual, combining evidence-based therapies with a focus on long-term wellness.
The right probiotic strains and nutraceutical supplements can re-establish balance in the gut microbiome. Dr. Kellman uses targeted formulas that are customized to each patient’s specific bacterial profile, addressing dysbiosis and encouraging microbial diversity.
Food is information for your body—and for your microbiome. Personalized nutrition plans eliminate inflammatory triggers while introducing nutrient-dense, gut-supportive foods. Lifestyle recommendations include stress reduction, improved sleep hygiene, and gentle movement, all of which enhance digestive healing.
For patients with more complex or chronic conditions, Dr. Kellman integrates cutting-edge treatments like peptides—short chains of amino acids that promote tissue repair, immune balance, and improved gut barrier integrity. IV therapy delivers essential vitamins, minerals, and antioxidants directly into the bloodstream, bypassing compromised digestion for faster results.
Gut healing is a process that evolves over time. Through ongoing microbiome testing and patient monitoring, protocols are adjusted to ensure consistent progress and lasting results.
At the heart of every treatment plan at our clinic lies one essential goal: restore the gut microbiome. This community of trillions of bacteria, fungi, and other microorganisms influences not only digestion but nearly every aspect of health—immunity, metabolism, hormones, and even longevity.
When the gut is inflamed or imbalanced, it can lead to fatigue, brain fog, weight gain, autoimmune flare-ups, and mood disturbances. By rebalancing the microbiome, patients experience:
Dr. Kellman’s comprehensive microbiome programs have helped thousands of New York City patients reclaim their health. Fixing the gut doesn’t just resolve digestive symptoms—it transforms overall vitality and well-being.
If you’re struggling with digestive symptoms—bloating, abdominal pain, irregularity, food sensitivities, or unexplained fatigue—it’s time to look deeper. You don’t have to live with chronic discomfort or depend on medications forever.
Schedule a consultation with Dr. Raphael Kellman at The Kellman Center in New York City to discover the root cause of your gut issues and begin your personalized journey toward restoration. Healing the gut means healing the body—and your transformation can start today.
Dr. Raphael Kellman’s vast experience, expertise and intuition provide him with a unique vantage point from which he is able to help people heal and truly change the course of so many lives. He is a pioneer and leader in functional medicine who coined the term “Microbiome Medicine.” He has developed hundreds of treatment protocols based on microbiome health, which is the orchestrator of all of the body’s systems.
