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Medical Advisory Board

Raphael Kellman, MD

Raphael Kellman, MD, graduate of Albert Einstein College of Medicine, has been at the forefront of functional medicine. Inspired by his study of the philosophy of science as an undergraduate, Dr. Kellman has a broad and unique view of health and wellness.

Dr. Kellman pioneered a groundbreaking brand of medicine and healing called “Microbiome Medicine" and was the first doctor to recognize the profound importance of the microbiome and its link to all aspects of human health. Research and conventional medicine are only now catching up to this, however, Dr. Kellman has been focused on the microbiome as a root cause of many chronic diseases, as well as a crucial factor in the reversal of these conditions, for many years.

Dr. Kellman is an author of 10 Best Selling Books on subjects that include Microbiome Health, Brain Health, Weight loss, and Thyroid Disease.

Dr. Kellman lives with his wife and two daughters in New York City. His deep love for his wife and his family gives meaning and purpose to the work that he does.


Dr. Samuel Sarmiento, MD, MPH, MBA

Dr. Sarmiento is a physician, consultant, and entrepreneur who loves solving complex problems in healthcare and beyond. He has a diverse background in surgery, public health, and business. He completed his internship in general surgery at Mayo Clinic, master’s degrees in public health and business at Johns Hopkins University, and a postdoctoral fellowship in clinical outcomes research at Johns Hopkins Hospital.

As a surgeon turned public health professional, Dr. Sarmiento understands the importance of preventive medicine to keep people healthy. Through his company, Juniper Life Sciences, he has helped healthcare companies to create products and services that are aligned with an approach to medicine that is personalized, precise, and functional.

Having completed a fellowship in medical journalism at NBC News, Dr. Sarmiento is a skilled science communicator. He has written extensively on health and medical topics for a general audience. He is also the author of dozens of academic publications and book chapters, and is a peer reviewer in health economics for the British Medical Journal.

Outside of health and medicine, Dr. Sarmiento is passionate about languages. He considers himself a polyglot, epistemophiliac, and fitness enthusiast. He speaks seven languages and is an advocate for a more holistic approach to health.


Dr. Abhishek Khatri

Dr. Abhishek Khatri is a dedicated sleep physician with a keen interest in obesity and overall wellness. After completing his medical degree in Australia, Dr. Khatri moved to the United States to further his training in Internal Medicine and Sleep Medicine at the University of Florida. His commitment to advancing patient care led him to become a Diplomate of the American Board of Obesity Medicine, underscoring his expertise in treating obesity-related conditions.

Currently, Dr. Khatri practices as a hospitalist physician with Central Florida Inpatient Medicine, where he has been providing comprehensive care since December 2022. In this role, he manages hospitalized patients and collaborates with specialists to ensure well-coordinated, high-quality medical care.

In addition to his clinical responsibilities, Dr. Khatri serves as Medical Director at ReadyMed, a role he has held since May 2023. His duties include supervising advanced practice providers (APPs), developing protocols for anti-obesity medications, and monitoring for adverse effects. He also leads monthly didactic sessions to support the ongoing education of APPs.

Prior to his current roles, Dr. Khatri served as an Assistant Professor of Medicine at UF Health from July 2021 to December 2022. During this time, he played a key role in both inpatient and outpatient care, mentoring internal medicine residents and medical students, and overseeing the Sleep Medicine elective for residents. He also contributed to the Bariatric Surgery committee as the Sleep Medicine liaison, enhancing the collaborative approach to patient care.

In 2023, Dr. Khatri further expanded his expertise by earning an MBA from the University of Florida’s Warrington School of Business. This additional training has equipped him with leadership and business acumen, enhancing his capabilities in medical administration.

Dr. Khatri is an active member of several professional societies, including the American Medical Association, The Obesity Society, the American College of Physicians, and the American Academy of Sleep Medicine. His diverse experience, passion for patient wellness, and dedication to both clinical practice and medical education make him a highly respected figure in his field.


Dr. Elaine Gavalas

Dr. Elaine Gavalas is a Board Certified Natural Medicine Practitioner from Columbia University, specializing in Natural Medicine, Podiatric Medicine, Exercise Science, and Yoga Therapy. She’s an international best-selling author of 14 health books, including The Yoga Minibook Series. Dr. Elaine has been featured on the NBC Today Show, Martha Stewart Living Today, and numerous podcasts, videos, magazines, and newspapers worldwide. With years of research distilled into 14 books, hundreds of published articles, videos, and transformational programs, Dr. Elaine is the foremost expert on the benefits of natural health.