Are You Ready To End Frustrating Bandaid Solutions & Address The Root Cause Of Your Concerns?
1:1 Functional Nutrition Programs to Help You Finally Feel Your Best
Work with a functional nutritionist in NYC (and virtually, nationwide) to uncover the root cause of your health concerns and receive a personalized nutrition, supplement, and lifestyle plan. This whole-food approach focuses on sustainable habits that serve you long term — no restrictive diets, calorie counting, or food trackers.
Prefer to start smaller? Take the free Root Cause Quick Scan →
Book a Free Discovery CallThis Message Is For You
If you’ve ever felt frustrated or overwhelmed by chronic health concerns, you’re not alone.
“This message is for anyone struggling with their health and frustrated with bandaid solutions.”
Every week I work with people, just like you, navigating the same struggles:
- Chronic fatigue that makes it hard to be present with the people you love.
- Gut issues — bloating, IBS, or IBD — that make eating feel like a guessing game.
- Autoimmune disease with fatigue, weight changes, brain fog, and muscle pain.
- Blood sugar dysregulation — pre-diabetes or diabetes, and trouble finding balance.
- Hormonal & perimenopausal shifts driving fatigue, mood, and weight changes.
- Brain fog that makes focus and demanding work feel out of reach.
- Uncertainty about what to eat amid so much conflicting information.
If any of this resonates, what’s on this page can help you restore your health through sustainable nutrition and lifestyle change — without restrictive diets, calorie counting, or food trackers.
Explore: Gut Health · Autoimmune · Hormones
But before I get into that, allow me to introduce myself…
Hi, I’m Dr. Sarah Khan, PhD, MBA
An Integrative and Functional Nutritionist who helps you move past bandaid solutions and restrictive diets — with a whole-food approach backed by evidence-based research to heal the root of your health concerns.
My Journey Into Becoming A Functional Nutritionist Started Back In 2015…
I struggled with gut issues throughout my teens and 20s and was diagnosed with Hashimoto’s at 14. I dealt with fatigue, brain fog, and hair loss, which only worsened when I left for college. My schedule and diet were thrown off track, leading to chronic fatigue, difficulty falling asleep, brain fog, weight gain, and frequent illnesses. Visits to endocrinologists and physicians were disheartening — I was often told it was “all in my head” or “just a phase,” or quickly offered thyroid medication without addressing the root causes.
Frustrated and hopeless, I thought this was my new “normal.” Then I began exploring nutrition and was initially overwhelmed by the vast, often conflicting information. This led me down a path of restrictive dieting and unsustainable practices, leaving me even more tired and nutritionally deficient. Discovering functional nutrition — whole-food, root-cause, and evidence-based — changed everything, and it’s the approach I now use to help you.
Read My Full Story
Then everything changed.
A college nutrition class introduced me to the whole-food, root-cause approach — food as medicine, backed by real evidence. Embracing functional nutrition reshaped my relationship with food, restored my energy, and showed me how much control we truly have over our well-being.
That’s why I’m here today: to give you the same opportunity to heal at the root and feel balanced, energized, and in control of your health — with a plan built around you.
How It Works
Here’s How 1:1 Functional Nutrition Helps You Build Balanced Health
Assessment
Comprehensive Health Assessment
We start by uncovering the root cause of your health concerns — a detailed look at your health history, lifestyle, and the specific symptoms that brought you here.
By the end of this step, you will:
- Understand the root cause of your concerns, so you see your health at a deeper level.
- Have clear, personalized health goals to work toward.
- Know how nutrition and lifestyle are shaping how you feel.
Personalized Plan
Personalized Nutrition Plan
Next, we formulate a plan that’s built entirely around you — designed to find what works for your body and your life, and to be sustainable rather than restrictive.
By the end of this step, you will:
- Have a comprehensive nutrition plan tailored to your unique needs and goals.
- Work with a strategy built around your genetics, lifestyle, and health conditions — not a one-size-fits-all template.
- Feel motivated and equipped to stick with habits that create lasting results.
Ongoing Support
Ongoing Support & Adjustments
Healing isn’t linear, so we meet regularly to track progress and adjust as your body responds — with email access between sessions for questions and real-time guidance.
By the end of this step, you will:
- Have a plan that evolves with you as your body changes.
- Feel supported between sessions, not left to figure it out alone.
- Build momentum toward steady, sustainable results.
Choose Your Program
Two levels of 1:1 support, matched to where you are and how deep the work needs to go. Not sure which fits? That’s exactly what your free discovery call is for.
Conditions I Help Address
Specialized, root-cause functional nutrition support for the concerns I see most often.
Hashimoto’s & Autoimmune
A root-cause approach to autoimmunity — reducing triggers, supporting the gut, and calming the immune attack.
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.
Fatigue & Metabolic Health
Rebuilding energy by addressing the HPA (stress) axis, blood sugar, and the nutrient gaps behind burnout and weight-loss resistance.
Are you ready to finally heal the root cause of your health concerns?
Then let’s do this.
No more frustration with bandaid solutions and anxiety around food choices. No more restrictive, unsustainable diets that leave you feeling hopeless.
Through 1:1 work, we get to the root cause of your health concerns. By the end, you’ll have a personalized plan tailored just for you — with nutrition, lifestyle, and supplement guidance built around your biology.
By the end of our work together:
- Feel balanced and well
- More energy and mental clarity
- Move past fatigue and brain fog
- Steady energy and mood
- A personalized, effortless health plan
- Sustained physical and mental wellbeing
In other words — you’ll be feeling balanced and energized.
Prefer to start smaller? Take the free Root Cause Quick Scan →
Hear From Past Clients
★ ★ ★ ★ ★ 5.0 on Google · 21 five-star reviews
★ ★ ★ ★ ★
“If you’re on the fence about getting a nutritionist, just do it — it’s so worth it!”
Working with Sarah has been such a pleasure! She’s so kind, smart, and gives realistic advice — small, doable changes, not a fad diet, that lead to big lifestyle changes. It affected me mentally and physically in the best way.
Natasha H.
★ ★ ★ ★ ★
“In 20 years of health issues, I’ve never found someone more willing to help me find relief.”
Two months in, I’m still in disbelief at the level of care Sarah delivers. She offers life-changing solutions for every aspect of health. I’d often felt left on an island by conventional medicine — now I have someone in the trenches with me.
Alisha R.
★ ★ ★ ★ ★
“From someone who didn’t eat breakfast for years, I now wake up craving it!”
Dr. Khan transformed my lifestyle — my eating habits, sleep, fatigue, and digestion all improved so much. Her recipes and little ideas have helped me tremendously. I highly recommend her!
June M.
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. Learn more about working with a functional nutritionist in NYC →
Ready to Feel Your Best?
Book a free discovery call and let’s map out a root-cause plan built around your biology. Not sure where your symptoms are coming from? Start with the free Root Cause Quick Scan.
Frequently Asked Questions
➤ ➤ ➤
Do I need to live in New York to work with you?
No. Care is virtual, so you can work with me from anywhere in the US. Most of my clients are in New York and the surrounding area, but location does not affect the depth of the work.
Do you accept insurance, HSA, or FSA?
No, I do not accept insurance, HSA, or FSA. Working privately lets me give the personalized, concierge-level attention this work requires, without the limits insurance places on time and approach.
Which program should I choose?
That is what the discovery call helps us decide. The programs differ in length and how often we meet, so we match the level of support to where you are and what you need.
Do you only work with women?
No. I work with both men and women, though more women find their way to my practice. The common thread is the type of concern and mindset, not gender.
What is functional nutrition, and how is it different from seeing a regular dietitian?
Functional nutrition looks for the root cause of your symptoms rather than managing them one at a time. Instead of asking only what you should eat, I ask why your body is responding the way it is — what is happening with your gut, your thyroid, your hormones, and your stress physiology — and build a plan around your biology rather than a generic template.
Will you work alongside my doctor?
Absolutely. Functional nutrition is meant to complement your medical care, not replace it. I do not diagnose disease or change your medications — that stays with your physician. What I add is the nutrition and lifestyle layer most conventional visits do not have time for, and I am glad to coordinate so everyone is working toward the same goal.
How long until I see results?
Most clients notice early shifts — better energy, less bloating, steadier mood — within the first few weeks. Deeper change, like calming an autoimmune flare or rebalancing hormones, usually unfolds over a few months as we work through the root causes in order.
Do you recommend supplements, and do I have to buy them from you?
When supplements will genuinely help, I recommend specific, high-quality ones through my professional dispensary so you know exactly what to take and at what dose. There is never any pressure to buy them through me, and supplements are always part of a bigger plan.
How do I get started?
The first step is a discovery call, where we talk through what you have been experiencing, decide whether we are a good fit, and choose the right level of support together. If you are not sure where your symptoms are coming from yet, you can also take my free Root Cause Quick Scan first.
