Functional & Integrative Nutrition in New York City
Functional Nutritionist in NYC for Gut, Thyroid & Hormone Health
Root-cause nutrition care for women and men told their labs are “normal” specializing in gut health, Hashimoto’s, autoimmune disease, and hormones. Working with clients across Manhattan, Brooklyn, Queens, and virtually nationwide.
Take the Root Cause QuizMeet Dr. Sarah Khan, PhD, MBA
I’m an integrative and functional nutritionist based in New York City. My clients usually arrive after years of being told their bloodwork looks fine — while they still feel exhausted, bloated, anxious, or unwell. I help them find and address the root cause rather than chasing one symptom at a time.
My work focuses on the gut, thyroid, hormones, and the gut-brain axis — the systems that quietly drive how you feel every day. Together we use functional lab interpretation, targeted nutrition, and realistic protocols to rebuild your health from the foundation up.
Book a Discovery CallConditions I Help Address
Specialized functional nutrition support for the root-cause conditions I see most often in my NYC practice.
Hashimoto’s & Thyroid
Nutrition strategies to calm autoimmune attack on the thyroid and support energy, mood, and metabolism.
Autoimmune Disease
A root-cause approach to autoimmunity — reducing triggers, supporting the gut, and lowering inflammation.
Gut Health & SIBO
Targeted protocols for bloating, IBS, and methane-dominant SIBO/IMO that address the cause, not just symptoms.
Hormones & Perimenopause
Support for cycle changes, perimenopause, and the hormonal shifts driving fatigue, mood, and weight changes.
Chronic Fatigue & HPA Axis
Rebuilding energy by addressing the HPA (stress) axis, blood sugar, and the nutrient gaps behind burnout.
Weight-Loss Resistance
For when diet and exercise aren’t enough — uncovering the thyroid, hormonal, and metabolic blocks.
Why a root-cause approach changes everything
Most conventional care treats symptoms in isolation — a pill for the thyroid, another for the gut, a third for sleep. Functional nutrition asks why those systems went off track in the first place. By looking at how the gut, thyroid, hormones, and stress response work together, we build one coherent plan instead of a pile of disconnected fixes.
“After years of being told everything was normal, Dr. Khan finally connected the dots. For the first time I understand my body — and I actually feel well again.”
Verified Client Review
A NYC functional nutritionist wherever you are
Based in New York City, I work with clients throughout Manhattan, Brooklyn, Queens, the Bronx, and Staten Island, as well as virtually with clients nationwide. Every engagement is fully personalized, so whether we meet by video or you’re local to the city, you get the same root-cause depth of care.
Not sure where your symptoms are coming from?
Take the free Root Cause Quick Scan and get a clearer picture of what might be driving how you feel — in just a few minutes.
