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(646) 760-6627Get Started
Open navigation menu
  • Functional Labs
  • What We Treat
    • What We Treat
    • Digestive Wellness
      • Digestive Wellness
      • Leaky Gut Syndrome
      • Food Sensitivities
      • Gas and Bloating Treatment
      • SIBO Treatment
      • Candida Overgrowth Treatment
      • GERD
      • Diarrhea
      • Irritable Bowel Syndrome
      • Inflammatory Bowel Disease
      • Constipation
    • Women’s Health & Hormones
      • Women’s Health & Hormones
      • Hormonal Imbalance
      • Menopause & Perimenopause
      • Polycystic Ovarian Syndrome
      • PMS & PMDD
      • Chronic UTI
      • Vaginal and Bladder Infections
      • Bioidentical Hormone Replacement Therapy (BHRT)
    • Fertility & Preconception
      • Fertility & Preconception
      • The Integrative Fertility Blueprint
      • Infertility
    • Anxiety Treatment & Support
    • All Conditions Treated
  • How We Treat
    • How We Treat
    • FAQs
    • Testimonials
  • Who’s Treating You
    • Who’s Treating You
    • Dr. Ronak Patel
    • Dr. Shannon Iselin
    • Dr. Maura Henninger
    • Dr. Brian Lamoreux
  • Learning Center
  • Connect
    • Connect
    • Pricing & Policies
(646) 760-6627Get Started
Flora Naturopathics
Call (646) 760-6627

Fax (212) 731-0270

Root-cause naturopathic telehealth medicine for whole-body wellness.

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New York, NY 10010

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5 Sylvan Road South
Westport, CT 06880

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Dr. Shannon Iselin

Meet your doctor

Dr. Shannon Iselin

Credentials, Education, and Achievements:

  • Bachelor of Science in Nutritional Sciences and Biochemistry at the University of Arizona
  • Doctor of Naturopathic Medicine at Sonoran University of Health Sciences
  • Postgraduate General Medicine Residency at Sonoran University of Health Sciences Medical Center
  • Board Certified by the North American Board of Naturopathic Examiners
  • Licensed Naturopathic Physician by the States of Alaska and Arizona
  • Member of the American Association of Naturopathic Physicians

Special Training & Emphasis on:

  • Women’s Hormones (PCOS, irregular periods, amenorrhea, endometriosis, PMS, acne, hair loss, thyroid-related hormone imbalance, post-birth control recovery)
  • Thyroid Health & Metabolic Hormone Balance
  • Gastrointestinal Disorders (Leaky Gut, SIBO, IBS, IBD, GERD)
  • Fertility, Infertility & Preconception Care

Why I became a naturopathic doctor:

As a young woman, I found myself needing more than what conventional women’s healthcare had to offer. No matter my concerns, it seemed hormonal birth control was my only option. But what I really needed was more time with providers during visits, more access to testing, options besides pharmaceuticals, and more than anything, an investigation into the root cause of my symptoms. Naturopathic medicine was this, and I have since set out to provide this high level of care as my standard of practice.

What conditions I love to treat: 

Hormonal concerns (PCOS, irregular periods, amenorrhea, endometriosis, PMS, hormonal acne, hair loss, thyroid dysfunction, post-birth control hormone recovery), digestive disorders (IBS, IBD, SIBO, bloating, reflux, GERD), fertility and preconception care, recurrent pregnancy loss, and male fertility concerns.

    Things you may not know about me:

    • I love all things regenerative wellness, including regular cold plunges in the nearby river.
    • My hobbies include gardening, yoga, and running.
    • I am a proud dog mom to a 5-lb chihuahua named Hazel.
    • My fiancé and I enjoy long-distance backpacking and canoeing in remote backcountry every summer.
    Book with Dr. ShannonMeet the full team
    Cover page of Dr. Shannon's acne self-care guide.

    Free guide

    Dr. Shannon's free acne self-care guide.

    Dr. Shannon put her everyday acne recommendations into one printable handout: the nutrition, skincare, and self-care steps she walks patients through to support clearer skin from the root.

    Download the guideBook with Dr. Shannon

    From the Learning Center

    Latest articles from Dr. Shannon.

    Visit the Learning Center
    A young woman farmer sits at a bird feeder and checks the composition of the grain to feed the chickens in a pen in the countryside

    Fertility & Preconception

    Decoding Ovarian Reserve Testing: What You Need to Know

    By Dr. Shannon Iselin (Cavanaugh) The ovarian reserve, a critical aspect of a woman’s fertility, plays a significant role in assisted reproductive…

    March 23, 2024

    Semen Analysis 101

    Fertility & Preconception

    Semen Analysis 101

    Infertility is a significant challenge for millions of couples globally, and male factor infertility plays a substantial role, contributing to over 40% of…

    January 23, 2024

    root cause of acne

    Skin Health

    Naturopathic Acne Treatments: Natural, Holistic Solutions for Clear Skin

    By Dr. Shannon Iselin (Cavanaugh) Acne, a common skin condition, can be more than just a cosmetic concern. It often reflects underlying imbalances in the…

    January 23, 2024

    Planning a Pregnancy

    Fertility & Preconception

    Planning a Pregnancy? Our fertility expert weighs in with top tips.

    Flora Naturopathics’ fertility expert Dr. Shannon Iselin (Cavanaugh) shares her top five non-negotiables. As the year winds to a close, we start to think…

    November 13, 2023

    Watch

    Latest videos from Dr. Shannon.

    View all videos
    ovarian reserve

    Fertility & Preconception

    Ovarian Reserve: What Lab Values Really Mean

    AMH… If you’re going through a fertility journey, you’re probably very familiar with this lab value. But what does it really mean for your ovarian reserve…

    January 22, 2024

    Flora Naturopathics banner: Dr. Shannon's Preconception Checklist

    Fertility & Preconception

    Dr Shannon’s Preconception Checklist

    Preparing for pregnancy begins long before conception. At Flora Naturopathics, we emphasize the significance of preconception care in promoting successful…

    November 6, 2023

    Patient stories

    Patients treated by Dr. Shannon.

    Every patient arrives with a different story. These are some of the outcomes patients reached with this doctor's root-cause approach.

    Marissa case study featured image

    Marissa

    Treated by Dr. Shannon Iselin

    Presented with

    Hypothyroidism with persistent fatigue, weight challenges, bloating, and minimal support despite being on medication with “normal” lab results.

    Outcome

    Improved energy, reduced bloating, daily bowel regularity, gradual weight loss, and reduced thyroid antibodies—allowing a lower dose of thyroid medication.

    Testing

    Thyroid panel (labs within range but not optimal), thyroid antibodies (elevated), food sensitivity testing, and nutrient assessment showing deficiencies in B vitamins and magnesium.

    Supplements

    Herbal support for thyroid function, vitamins for nutrient repletion, and supplements to repair gut lining and reduce autoimmune triggers.

    Nutrition

    Elimination of food sensitivities with a focus on gut-healing foods and nutrient-dense meals to support thyroid and metabolic function.

    Lifestyle

    Increased daily movement and exercise as energy improved, reduced reliance on caffeine, and a renewed sense of physical comfort and wellbeing.

    Rebecca & Cody case study featured image

    Rebecca & Cody

    Treated by Dr. Shannon Iselin

    Presented with

    Unexplained infertility after 18 months of trying; hesitant to begin IUIs without identifying a root cause.

    Outcome

    Successfully conceived after four months of targeted support and accurately timed intercourse based on improved cycle tracking.

    Testing

    Hormone panels for both partners, semen analysis (low testosterone and suboptimal sperm parameters for Cody), DUTCH test (high cortisol for Rebecca), food sensitivity panels, toxin screening, antioxidant and mitochondrial function assessments.

    Supplements

    Antioxidant and mitochondrial support, supplements to improve testosterone and sperm quality for Cody, and adrenal support to lower cortisol for Rebecca.

    Nutrition

    Elimination of food sensitivities and nutrition strategies to support hormone balance, energy production, and fertility.

    Lifestyle

    Cycle tracking education, sleep and stress optimization for Rebecca, and lifestyle modifications to support Cody’s hormone health and overall reproductive wellness.

    Monica & Eric case study featured image

    Monica & Eric

    Treated by Dr. Shannon Iselin

    Presented with

    Unexplained infertility with three failed IUIs; Monica had irregular cycles, and Eric’s semen analysis was below optimal but within standard reference ranges.

    Outcome

    Improved hormone and inflammation markers for both partners; Eric’s semen quality increased significantly, and Monica’s cycles stabilized. They conceived successfully on their fourth IUI.

    Testing

    DUTCH Complete for Monica (high cortisol, low progesterone), bloodwork showing elevated inflammation and insulin resistance, male hormone panel showing suboptimal testosterone for Eric, toxin exposure panels for both, and antioxidant status evaluations.

    Supplements

    Antioxidant and detox support for both partners, targeted supplements to improve cortisol balance for Monica and testosterone for Eric.

    Nutrition

    Dietary plan focused on insulin sensitivity, reducing inflammation, and supporting hormone health for conception.

    Lifestyle

    Toxin reduction strategies, stress management techniques, and daily habits to support metabolic and reproductive function for both partners.

    Amanda case study featured image

    Amanda

    Treated by Dr. Shannon Iselin

    Presented with

    PCOS with irregular cycles and significant digestive symptoms; later transitioned into preconception preparation.

    Outcome

    Regulated cycles with consistent ovulation by mid-cycle; conceived in the third month of trying with her partner.

    Testing

    DUTCH Complete revealing high androgens and cortisol, SIBO breath test, GI Map identifying dysbiosis, and bloodwork showing deficiencies in B12, folate, and Vitamin D.

    Supplements

    Targeted herbal blends to support ovulation and reduce testosterone, antimicrobial and supportive supplements for SIBO, and repletion of key nutrients through supplementation.

    Nutrition

    Gut-supportive diet with SIBO-focused modifications and nutrient-dense meals tailored to restore vitamin and mineral balance.

    Lifestyle

    Stress-reducing practices and sleep optimization strategies to support hormonal regulation and fertility.

    Kathryn case study featured image

    Kathryn

    Treated by Dr. Shannon Iselin

    Presented with

    Uterine fibroids, heavy periods, and mid-cycle spotting; seeking a natural approach to symptom relief and hormone balance.

    Outcome

    After six months, three fibroids resolved and the largest reduced in size; mid-cycle spotting stopped and periods became shorter with fewer PMS symptoms.

    Testing

    Cycle day 3 blood hormone panel, DUTCH Complete, food sensitivity testing, and serum labs including CRP, insulin, Vitamin D, thyroid, iron, and ferritin, all assessed using optimal reference ranges.

    Supplements

    Herbal tinctures to support fibroid reduction and endometrial health; nutrients targeting estrogen metabolism, detoxification, and inflammation.

    Nutrition

    Anti-inflammatory diet paired with a 5-day hormone reset detox; focus on supporting methylation and reducing exposure to estrogenic foods.

    Lifestyle

    Eliminated endocrine-disrupting chemicals from daily products and home; supported detox pathways and hormone balance through gentle lifestyle shifts.

    Julia case study featured image

    Julia

    Treated by Dr. Shannon Iselin

    Presented with

    PCOS with irregular cycles, acne, digestive issues, and numerous ovarian cysts; seeking support for conception.

    Outcome

    Conceived in the third month of trying after six months of care; regulated cycles, resolved gut issues, and optimized nutrient status for a healthy pregnancy.

    Testing

    Cycle day 3 hormone panel, DUTCH Complete, GI Map, food sensitivity testing, and comprehensive serum labs including CBC, CMP, insulin, Vitamin D, B12, thyroid, iron, folate, homocysteine, and MMA—all reviewed against optimal ranges.

    Supplements

    Anti-fungal protocol, targeted antioxidants, vitamins for deficiency correction, and support for ovarian and gut health.

    Nutrition

    Elimination of food sensitivities, support for a diverse microbiome, and increased intake of nutrient-dense foods to balance hormones and blood sugar.

    Lifestyle

    Focused on daily bowel regularity, reduced inflammatory triggers, and overall preconception wellness to lower risk of gestational complications and PCOS inheritance.

    Cassidy case study featured image

    Cassidy

    Treated by Dr. Shannon Iselin

    Presented with

    Poor egg maturation during IVF; two unsuccessful egg retrievals with no mature eggs.

    Outcome

    After three months of targeted support, Cassidy’s third retrieval yielded 12 eggs. Six were mature and successfully fertilized.

    Testing

    Cycle day 3 hormone panel (FSH, LH, Estradiol, Prolactin, SHBG, DHEA-S, Testosterone, DHT), DUTCH Complete, Metabolomix, food sensitivity panel, and serum labs including CRP, fasting insulin, Vitamin D, thyroid panel, iron, and ferritin, all evaluated against optimal ranges.

    Supplements

    Targeted antioxidants, mitochondrial support, and anti-inflammatory nutrients tailored to her lab results.

    Nutrition

    Focused on balancing blood sugar through stable meals, supporting nutrient repletion, and reducing inflammatory food triggers.

    Lifestyle

    Stress reduction techniques, improved sleep hygiene, and gentle movement to support hormonal balance and recovery.

    Alicia case study featured image

    Alicia

    Treated by Dr. Shannon Iselin

    Presented with

    PCOS

    Outcome

    Able to stop taking some medications, improved insulin sensitivity, regular periods, periods are lighter and less painful

    Testing

    Functional testing found elevated blood glucose and decreased insulin sensitivity. Stool tests showed candida overgrowth and dysbiotic gut microbiome. Several inflammatory markers were elevated.

    Supplements

    Vitamins and minerals to support healthy blood sugar, antimicrobials to address gut dysbiosis, gut building and supporting probiotic, nutrients, and amino acids

    Nutrition

    Whole foods diet, limited added sugar and refined carbohydrates, increase in dietary fiber

    Lifestyle

    30 minute low intensity steady state exercises in the morning 3-5 days weekly, mindfulness meditation practice using the Calm app, intentionally aiming to get 8 hours of sleep nightly

    Danielle case study featured image

    Danielle

    Treated by Dr. Shannon Iselin

    Presented with

    Perioral dermatitis, frequent allergy flares, constipation, bloating after every meal

    Outcome

    Skin cleared, decreased in severity and frequency of allergy related symptoms, decreased use of antihistamine medication, bloating resolved, regular daily bowel movements

    Testing

    Ggut microbiome testing revealed bacterial overgrowths and numerous food sensitivities causing inflammation

    Supplements

    Antimicrobials, probiotics, gut building and supporting nutrients and amino acids

    Nutrition

    Low FODMAP combined with limiting food sensitivities and alcohol, focus on whole foods

    Lifestyle

    Strengthening the parasympathetic nervous system through regular breathwork. Limiting distractions at mealtime + setting consistent and regular mealtimes while avoiding snacking between meals to optimize digestion

    Natalie case study featured image

    Natalie

    Treated by Dr. Shannon Iselin

    Presented with

    Infertility, trying to conceive x12 months

    Outcome

    Conceived after 3 months of working together

    Testing

    Functional hormone, thyroid, nutrition, inflammation, blood sugar and insulin sensitivity testing, additional functional labs: anti-oxidant status and mitochondrial health assessed

    Supplements

    Individualized combination of hormone balancing herbs, b-vitamins and antioxidants

    Nutrition

    Focus on healthy fats and increased protein. Limiting added sugar and refined carbs

    Lifestyle

    Regular yoga practice to promote circulation and strengthen connection with one’s body.

    Sarah case study featured image

    Sarah

    Treated by Dr. Shannon Iselin

    Presented with

    Preconception Preparation

    Outcome

    Improved sleep, energy, and conceived second month trying

    Testing

    Functional hormone, thyroid, nutrition, blood sugar and insulin sensitivity testing, additional functional labs: anti-oxidant status and mitochondrial health assessed

    Supplements

    Individualized prenatal, fish oil, adaptogens, and antioxidants to support egg quality

    Nutrition

    Increasing protein, fiber, and omega rich fats

    Lifestyle

    Tracked cycle with Dr. to accurately determine fertile window, optimized light exposure and limited blue light to regulate circadian rhythm. Regular strength training with low impact steady state exercises.

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