Hormone Health Nutritionist NYC
Root-Cause Support for PMS, PMOS (PCOS), PMDD, Perimenopause & Thyroid Health
Struggling with fatigue, weight changes, PMS, PMOS (formerly PCOS), irregular cycles, mood swings, sleep issues, or perimenopause symptoms? Dr. Sarah Khan uses a systems biology approach to help uncover the root causes of hormone imbalances through personalized functional nutrition, gut health support, blood sugar balance, and lifestyle strategies.
New York Cityβbased Β· Virtual appointments nationwide
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By Dr. Sarah Khan, PhD, MBA Β· Integrative & Functional Nutritionist Β· PhD in Integrative and Functional Nutrition
A Hormone Nutritionist for PMS, PMOS (PCOS), PMDD, Perimenopause, Menopause & Thyroid Health
If you're struggling with fatigue, mood swings, PMS, painful periods, irregular cycles, weight gain, brain fog, poor sleep, hot flashes or digestive symptoms, or you simply don't feel like yourself, your hormones may be trying to tell you something.
Hormones influence energy, metabolism, mood, sleep, digestion, fertility, immune function and healthy aging. Yet hormone imbalances rarely happen in isolation. In my practice, hormone symptoms are almost always connected to something upstream: blood sugar regulation, gut health, inflammation, thyroid function, nutrient status, stress physiology or metabolic health.
As a hormone health nutritionist in NYC, I use a systems biology approach to find those root causes and build a personalized nutrition and lifestyle plan around them. I see clients in person in Manhattan and virtually nationwide.
Common Signs of Hormone Imbalance
Energy, Mood & Metabolism
- Fatigue and low energy
- Weight gain or difficulty losing weight, especially around the midsection
- Brain fog and poor concentration
- Mood swings, anxiety and irritability
- Sugar cravings and energy crashes
- Sleep disturbances
Cycle, Skin & Body
- PMS and PMDD
- Painful, heavy or irregular periods
- Acne, excess hair growth or hair thinning
- Low libido
- Hot flashes and night sweats
- Digestive symptoms and bloating
These symptoms are common, but they are not something you simply have to live with. They are signals worth investigating.
Why Hormones Become Imbalanced
One of the biggest misconceptions in hormone health is that symptoms are caused solely by hormone levels.
In reality, hormones sit inside a network of interconnected systems. Blood sugar regulation, inflammation, the gut microbiome, sleep, stress physiology, body composition and nutrient status all shape how hormones are produced, signal and are cleared from the body.
This is why simply "balancing hormones" with a supplement or a single protocol so often fails to create lasting results. The real question is: why did the dysfunction develop in the first place?
My Systems Biology Approach to Hormone Health
Rather than looking at hormones in isolation, I assess the systems that drive them.
1. Blood Sugar & Insulin
Blood sugar imbalance is one of the most common drivers of hormone dysfunction. Frequent spikes and crashes contribute to fatigue, cravings, mood changes, weight gain, inflammation and, over time, insulin resistance. Elevated insulin in turn affects ovarian hormone production, which is one reason blood sugar sits at the center of PMOS, the condition formerly called PCOS (more below).
2. Liver Health & Hormone Metabolism
The liver processes and clears hormones, including estrogen. Nutrient deficiencies, chronic inflammation, alcohol, poor dietary patterns and stress can all affect how efficiently that happens, so supporting liver function is often part of restoring balance.
3. Gut Health & the Estrobolome
A subset of gut bacteria, known as the estrobolome, helps regulate how much estrogen is reactivated and recirculated versus eliminated. Research links disruptions in this gut-estrogen axis to a range of estrogen-related conditions (Baker et al., 2017).
That is why IBS, SIBO, constipation, dysbiosis and intestinal permeability so often travel alongside hormone symptoms, and why many of my hormone clients also struggle with digestive issues.
4. Mitochondrial Function & Energy
Hormones and cellular energy production are closely linked. When mitochondria are strained by chronic stress, inflammation, nutrient deficiencies or metabolic dysfunction, fatigue, brain fog and poor resilience tend to follow.
5. Stress, Cortisol & the Nervous System
Chronic stress influences virtually every hormone in the body. Persistently elevated or disrupted cortisol can affect thyroid function, reproductive hormones, blood sugar, sleep, energy and immune function. For many clients, lasting change requires supporting the nervous system, not only the diet. If this sounds familiar, read 15 signs your cortisol is too high.
6. Environmental Exposures
Endocrine-disrupting chemicals found in some plastics, personal care products and household items can interfere with hormone signaling. Reducing exposure is a practical, often overlooked part of a hormone plan. I cover this in depth in the hidden impact of endocrine disruptors.
Hormone Conditions I Commonly Support
PMOS (Formerly PCOS): Polyendocrine Metabolic Ovarian Syndrome
In May 2026, polycystic ovary syndrome (PCOS) was officially renamed polyendocrine metabolic ovarian syndrome (PMOS). The new name came out of a global consensus process led by Monash University, involving 56 patient and professional organizations and more than 22,000 survey responses, and was published in The Lancet (Teede et al., 2026). It has been endorsed by organizations including the Endocrine Society and the American Society for Reproductive Medicine.
The old name was misleading. People with this condition don't actually have an increase in abnormal ovarian cysts, and the focus on the ovaries hid what the condition really is: a hormonal and metabolic disorder that affects weight, metabolism, mental health, skin and reproduction. It affects an estimated 1 in 8 women worldwide. The new name is being phased in over roughly three years, with full adoption planned for the 2028 international guideline update. Until then, the 2023 international guideline remains the current standard for diagnosis and care, so if you were diagnosed with PCOS, nothing about your diagnosis has changed.
The rename puts the "metabolic" piece front and center, which is exactly where nutrition has the most leverage. Insulin resistance is a core feature for a large share of women with PMOS, including many who are not overweight, and elevated insulin drives the ovaries to produce more androgens (Diamanti-Kandarakis & Dunaif, 2012). That is what fuels symptoms like irregular cycles, acne, excess hair growth, hair thinning and stubborn weight gain.
The 2023 international guideline recommends healthy eating and physical activity for everyone with the condition, and notes that no single diet type has been shown to be superior (Teede et al., 2023). That is exactly why a personalized plan matters. My PMOS work focuses on:
- Improving insulin sensitivity through meal structure, protein, fiber and movement
- Stabilizing energy and cravings
- Reducing inflammation
- Supporting the gut and liver pathways that influence androgen and estrogen balance
- Addressing nutrient gaps that commonly show up in PMOS
PMS & PMDD
Many women experience significant physical and emotional symptoms in the week or two before their period, including mood changes, irritability, anxiety, cravings, fatigue, breast tenderness and headaches. For PMDD, those mood symptoms can be severe enough to disrupt work and relationships.
Nutrition is not a cure, but it can meaningfully change symptom severity. Blood sugar stability, inflammation, gut health and nutrient status all play a role, and some nutrients have direct trial evidence: in a large randomized trial, calcium supplementation significantly reduced PMS symptoms compared with placebo (Thys-Jacobs et al., 1998). PMDD care should also include your physician or a mental health provider, and I'm glad to coordinate with them.
Perimenopause
Perimenopause can begin years before your final period, often in your late 30s or 40s. Common symptoms include poor sleep, weight gain, mood changes, brain fog, irregular cycles, fatigue and hot flashes. A systems biology approach helps you move through this transition while protecting metabolic health, muscle and energy.
I have a dedicated perimenopause nutrition page, and you may also find these helpful: early signs of perimenopause and why weight gain happens in perimenopause.
Menopause
Menopause is more than a decline in estrogen. It affects metabolic health, muscle mass, bone health, cognition, the gut microbiome and inflammation. Nutrition becomes increasingly important for staying strong and energized through this stage of life.
Thyroid Health & Hashimoto's
The thyroid is central to metabolism, energy, mood, digestion and hormone regulation, and thyroid dysfunction often overlaps with other hormone shifts. I frequently work with clients managing Hashimoto's thyroiditis and hypothyroidism, especially when fatigue, brain fog and weight gain persist despite "normal" labs. See also why Hashimoto's symptoms can get worse after 40.
Insulin Resistance & Metabolic Health
Insulin resistance often develops quietly for years before it shows up on standard labs, and it affects hormones in both women and men. Signs include energy crashes after meals, strong cravings, weight gain around the midsection and difficulty losing weight despite eating well. Addressing it early is one of the most effective ways to improve hormone health overall.
How We Work Together
Comprehensive Assessment
Every client starts with a comprehensive intake covering your health history, cycle history, symptoms, diet, sleep, stress and major life events. The goal is to understand why your hormones are struggling, not just that they are.
Targeted Testing
Testing is used when it adds clarity, never just to order for its own sake. Depending on your situation, that may include hormone testing, a comprehensive thyroid panel, functional stool testing and a closer look at the standard bloodwork you already have, such as fasting glucose, insulin markers, iron and vitamin D. Results are interpreted as a connected picture rather than a list of isolated numbers.
Your Personalized Plan & Ongoing Refinement
Your plan is built around what is driving your symptoms and sequenced so it fits a real, busy life. Hormone changes unfold over cycles, so we track how you feel, adjust as your body responds and keep building until the results hold.
Nutrition Strategies for Hormone Health
Every plan is personalized, but common areas of focus include:
Protein Optimization
Supports blood sugar, muscle, metabolism and hormone production.
Blood Sugar Balance
Meals built on protein, fiber, healthy fats and complex carbohydrates.
Gut Health Support
For digestion, immune function and estrogen metabolism.
Anti-Inflammatory Nutrition
Supports hormone signaling and metabolic health.
Stress & Sleep Support
Foundational for healthy hormone function.
Targeted Supplementation
Only when it genuinely helps, as part of a bigger plan.
Why Work With Dr. Sarah Khan, PhD, MBA?
I hold a PhD in Integrative and Functional Nutrition, and my doctoral research focused on inflammatory markers and thyroid conditions. I help clients move beyond symptom management to uncover the root causes of their health concerns.
My approach is also personal. After years of struggling with Hashimoto's myself, I know what it feels like to be told your labs are fine when you don't feel fine. My goal is not simply to improve lab values. It is to help you build a more resilient body where your hormones can function the way they were designed to.
Functional nutrition complements your medical care rather than replacing it. I don't diagnose disease or change medications, and I'm always happy to coordinate with your physician.
Frequently Asked Questions
What does a hormone health nutritionist do?
A hormone health nutritionist looks at the nutrition and lifestyle factors that shape how your hormones are produced, signal and are cleared, such as blood sugar, gut health, inflammation, stress and nutrient status. Instead of treating a single symptom, the goal is to find and address what is driving the imbalance, then build a plan you can sustain.
Can nutrition help balance hormones?
Yes. Nutrition directly influences blood sugar regulation, inflammation, gut health, nutrient status and hormone metabolism, all of which affect how your hormones behave. It works best as part of a personalized plan rather than a generic "hormone diet."
Is PMOS the same as PCOS?
Yes. PMOS (polyendocrine metabolic ovarian syndrome) is the new name for PCOS, announced in May 2026. The condition, its diagnosis and its management are the same. The name was changed to reflect that it is a hormonal and metabolic condition rather than a disease of ovarian cysts.
Can a nutritionist help with PMOS (PCOS)?
Yes. Because insulin resistance plays a central role for many women with PMOS, nutrition and lifestyle changes are recommended as a foundation of care by international guidelines. I focus on improving insulin sensitivity, reducing inflammation and supporting the gut and liver, in a way that fits your life and works alongside your medical care.
Can functional nutrition help with PMS and PMDD?
Many women see meaningful improvement when underlying contributors like blood sugar swings, inflammation and nutrient deficiencies are addressed. For PMDD, nutrition is one part of care, and I encourage working alongside your physician or mental health provider.
How does gut health affect hormones?
The gut microbiome, especially a group of bacteria called the estrobolome, influences how estrogen is metabolized and eliminated. Constipation, dysbiosis and conditions like SIBO can all affect hormone balance, which is why gut health is a core part of my hormone work.
Can nutrition support perimenopause and menopause?
Yes. Nutrition can support metabolic health, muscle maintenance, sleep, energy, digestion and healthy aging through both transitions.
Do you work with men on hormone health?
Yes. I work with both men and women. Men often come to me for metabolic and hormone concerns such as low energy, weight gain around the midsection and insulin resistance.
Do you order hormone or lab testing?
When it adds clarity, yes. That may include hormone testing, a comprehensive thyroid panel, functional stool testing and a review of your existing bloodwork. Testing is used to make your plan more precise, not as an end in itself.
How long until I notice a difference?
Many clients notice early shifts in energy, cravings and digestion within the first few weeks. Deeper hormonal changes, such as more regular cycles or steadier mood across the month, usually take a few cycles as we work through the root causes in order.
Do you work virtually?
Yes. I see clients in person in Manhattan and virtually nationwide. Learn more about working with me online.
Clinical references
- Baker JM, Al-Nakkash L, Herbst-Kralovetz MM. Estrogen-gut microbiome axis: Physiological and clinical implications. Maturitas. 2017;103:45-53. PubMed
- Diamanti-Kandarakis E, Dunaif A. Insulin resistance and the polycystic ovary syndrome revisited: an update on mechanisms and implications. Endocrine Reviews. 2012;33(6):981-1030. PubMed
- Teede HJ, et al. Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome: a multistep global consensus process. The Lancet. 2026. PubMed
- Teede HJ, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. Journal of Clinical Endocrinology & Metabolism. 2023;108(10):2447-2469. PubMed
- Thys-Jacobs S, et al. Calcium carbonate and the premenstrual syndrome: effects on premenstrual and menstrual symptoms. American Journal of Obstetrics & Gynecology. 1998;179(2):444-452. Journal
This page is for educational purposes and is not medical advice. Please talk with your physician before making changes to medications or starting supplements.
Ready to Address the Root Causes of Your Hormone Symptoms?
You don't have to navigate fatigue, hormone imbalances, PMS, PMOS (PCOS), perimenopause, menopause or thyroid concerns alone. Together, we'll uncover what's driving your symptoms and create a personalized roadmap to restore your energy and support long-term hormone health.
Not sure where to start? Take the free 2-minute Root Cause Quiz.
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βI have noticed such a difference in the symptoms I came to her for, and am blown away by her knowledge!β
I have worked with Sarah personally and also often send my clients her way as I truly believe in her and her practice. She takes amazing care of her clients and genuinely cares. She is truly amazing, I cannot recommend her enough!
Deanna D.