Naturopathic Oncology
Fifteen-plus years guiding patients through cancer care — optimizing conventional therapies, mitigating side effects, and building aggressive prevention programs.
Learn more →Naturopathic telehealth · est. 2002
Careful medicine, at the pace of a conversation.
I'm Dr. Greg Nigh — a naturopathic physician with over 25 years of clinical experience. Together we build careful, individualized treatment plans grounded in natural medicine and current research, delivered by telehealth from the comfort of your home.
25 years in clinical practiceNaturopathic Doctor (ND)Published researcherTelehealth nationwide
A different kind of visit
Why naturopathic telehealth?
After 25 years building a practice in Portland, Oregon, I moved to the East Coast. My active Oregon license allows me — via telehealth — to continue working with established patients and to take new patients as well.
"Quality care, made accessible — without leaving your home."
Your champion for optimal health
A focus on the whole person.
With more than two decades as a primary care naturopathic physician, I guide patients through their health journey with strategies tailored to who they actually are — supporting what the body already knows how to do.
- 01A thorough intake and evaluation, without shortcuts.
- 02Attention to the mental, physical, and emotional aspects of health.
- 03Treatment guided by current research and decades of clinical experience.
- 04Care that is highly individualized — every patient is a unique puzzle.
Areas of focus
Refined over decades of clinical work.
GI Health & Sulfur Research
Over a decade of research into sulfur metabolism informs treatment for SIBO, IBS, inflammatory bowel disease, and chronic skin conditions.
Learn more →Autonomic Nervous System Regulation
ANS dysregulation is a central and commonly-overlooked factor in chronic illness and the failure to respond to treatment. Over several years I have incorporated a growing number of tools to help patients achieve greater ANS balance and flexibility — allowing all other therapies a greater potential to be beneficial.
Learn more →Complex Chronic Illness
Mold-related illness, Lyme, chronic fatigue, fibromyalgia, autoimmunity, long-COVID, and vaccine-related illness — the cases that remain unresolved elsewhere.
Learn more →My story
A long road into the work.
I grew up in Indiana, did my undergrad at Notre Dame, started graduate school at DePaul in Chicago, then more graduate study at ASU in Tempe, where I completed a master's degree. From there to Portland, Oregon, for a Master of Science in Oriental Medicine and a doctorate in Naturopathic Medicine, both finished in 2001. I've been in clinical practice since February 2002.
I like to research things, and to publish and talk about what I find. My clinical specialty is naturopathic oncology, though I've spent decades treating a wide range of complex illness.
Research & writing
Reading, writing, and thinking out loud.
Melatonin in Health and Disease and its Metabolism by the Gut Microbes: Implications for Deuterium Homeostasis?
Journal article · 2026How gut microbes metabolizing melatonin may shape the body's deuterium balance — with implications for mitochondrial health.
Autoimmune and Neoplastic Outcomes After the mRNA Vaccination: The Role of T Regulatory Cell Responses
Journal article · 2024A mechanistic look at how altered T-regulatory cell activity after mRNA vaccination may drive autoimmune and cancer outcomes.
The Devil in the Garlic: The Paradoxical Roles of Sulfur in Human Physiology
Feature article · Wise Traditions · 2022Why sulfur — long thought of as universally beneficial — can also drive symptoms in SIBO, IBS, and chronic gut dysfunction.
Also in person
Rhode Island residents may also see Dr. Nigh in person at Rhode Island Naturopathic — compassionate, in-office naturopathic care.
Get started
Ready for a conversation about your health?
Schedule an online consultation and let's take the next step together — at your pace, in your own time.
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