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Dr. Kara Fitzgerald
Individualized Evidence Based Integrative & Functional Medicine
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  • YOUNGER YOU
    • Practitioner Training
    • What is Younger You
    • Books
      • Younger You book
      • Better Broths and Healing Tonics Book
    • Discover Your Bio Age
      • Bio Age Quiz (BASA) – FREE
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      • 1-1 Clinic Support
      • For Businesses
    • Supplements
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    • Our Clinic
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Romilly Hodges, Nutritionist

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Romilly Hodges advises on matters of food and nutrition impacts on health. She is a nutrition scientist, public health nutritionist, dietitian-nutritionist, clinical nutritionist, and sports nutritionist.

Category: Our TeamBy Kara Fitzgerald, NDMarch 31, 2015Leave a comment

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OUR SPONSORS

I am eternally grateful to our sponsors who, by blogging, podcasting and advertising with us, enable me and my team to devote energy and time to writing and publication. All the companies who sponsor us are companies that I trust for myself and my patients and use regularly in my clinical practice. Please check out their websites! – Dr. KF

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TESTIMONIALS

Dr. Fitzgerald’s book is an extraordinary integration of a vast amount of diverse information that makes practical sense of the complex interplay between our genes, the folate/vitamin B12 cycle, homocysteine, and the clinical importance of methylation. 

Jeffrey Bland, PHDPresident PLMI

I was thrilled to see the principles of a methylation food plan. This helped to confirm my teaching principles.

Kylene Bogden, MS, RDN, CSSD, LDNCleveland Clinic Center for Functional Medicine

The nutrition methylation webinar has fabulous information on methylation and specific nutrients that are required to support the process. I think I can speak for our team of dietitian nutritionists in saying that it is valuable to connect the science and biochemistry from Dr. Fitzgerald’s point of view with the nutrition and implementation from Romilly. They are a knowledgeable team! I love that this is a food-first approach with an emphasis on food and dietary intervention for sustainable long-term nutritional support. Food is not just medicine, it’s information for methylation and you can’t supplement your way out of a bad diet!

Brigid Titgemeier, MS, RDN, LDCleveland Clinic Center for Functional Medicine

I enjoyed the presentation and really appreciated the food first approach. There were many talking points to help solidify this concept with patients, particularly those that don’t “buy in” to the food first approach or simply want to take a supplement.

Lindsay Malone, MS, RD, CSO, LDCleveland Clinic Center for Functional Medicine

Dr. Kara Fitzgerald always produces clinically relevant and compelling cutting-edge content in her blogs, PodCasts and newsletters and I try to never miss one. Her dept of knowledge in the functional medicine paradigm and its relevance to modifying the course of the chronic disease epidemic is not only valuable, but inspiring. She is a respected colleague and I always appreciate the effort she puts into keeping up the important dialogue between integrative and functional medicine clinicians, as well as her clear desire to educate the health care consumer in the process. Dr. David M. Brady (University of Bridgeport, Designs for Health, Inc., Diagnostic Solutions Labs, LLC, and DrDavidBrady.com)

David BradyDoctor

I want to drop you a note to tell you how much I enjoy your newsletter-Your newsletter is no doubt the best newsletter I receive. It’s not too long, not too short, yet chock full of great info, and, most importantly for the reader, enjoyable to read because your playfulness comes through. All of this separates your newsletter from the pack. You are doing a superb job, and it’s a pleasure to read! Keep it up!

Robert Hedaya, MDClinical Professor of Psychiatry

I’ve had the opportunity to review Dr. Kara Fitzgerald’s blogs. She is a well-recognized leader of functional, integrative medicine. Her blogs effervesce with her enthusiasm for her subject matter and convey her genuine warmth and compassion for her patients. She writes in an engaging style while conveying significant and meaningful information about the varied topics she has covered. They are simply fun to read and easy to learn from her wealth of experience.

Shalesh Kaushal, MD PhD

Dr. Kara’s blogs are current, scientifically sound, and relevant to clinical care. Her case studies and reviews are focused on how to improve clinical thinking and outcomes using a systems biology and functional medicine approach. They are one of my favorite learning tools and I look forward to her insights and interviews monthly!

Sarah Lobisco, NDND, IFM-CP

Dr. Fitzgerald is what you get when you merge a brilliant clinical brain with a powerful loving heart. Her ability to incorporate seemingly disparate details into a mosaic of meaning that can improve patient care is extraordinary. The opportunity to learn from her should never be missed without great reason.

David H. Haase, MDIFM-CP, FABFM, DABIHM, CNS, BCN

Kara and I have co-authored case studies for peer-reviewed articles and textbooks over the years. I love reading her blog, while evidenced-based and geared towards the professional, the casual style makes for fun reading!

Dr. Mark Hyman, MD9 Time NY Times Best Selling Author

I thoroughly enjoy reading your blog and recommend it to the medical students. It is interesting, informative and up to date as well as an excellent supplement to their text.

Albert E. Dahlberg, MD, PhDProfessor, Brown University

Dr. Kara Fitzgerald’s writing style is clear, concise, well-translated from scientific gobbledygook to understandable every language. And most importantly, it’s accurate.

Dr. Tom O’BryanFounder: The Gluten Summit

Of the myriad blogs I receive in my inbox, Kara’s is one that I actually read! It’s funny, clinically relevant and smart.

Sara Szal, MDNYT Best Selling Author, Clinician

I am a regular reader of Dr Fitzgerald’s blog/newsletter. I read it because it is useful. Dr. Fitzgerald, stimulated by a recent article, looks into the bulk of the literature and synthesizes the relevant takeaways. Dr Fitzgerald is brilliant and always delivers clinical pearls.

Tom Sult, MDIFM Faculty, Author, Clinician

Wading through emails is not an ideal part of my day. For this reason, I’m very particular about who’s information I want coming into my inbox. When I see an email come in from Dr Fitzgerald, I stop what I am doing and I read it fully right then so I don’t miss it. Her content is always interesting, clinically relevant, cutting edge and many times entertaining as well. I only wish one thing: that she’d write more!

Ben Lynch, NDExpert on MTHFR & Epigenetics

Dr. Fitzgerald has her finger on what’s happening in holistic and integrative health and medicine. I love reading her blog! It’s always right on the mark!

Liz Lipski, PhD, CCN, CNS, CHNAuthor, Lecturer, Educator

I love reading Dr Fitzgerald newsletter! It is both funny and relevant and offers great info for my patients and colleagues.

Susan Blum, MD, MPHNYT Best Selling Author

Dr. Kara Fitzgerald is a clear, brilliant, and insightful clinician. She always seems to unwrap the story of the patient so well, then identifies the pertinent imbalances and together with the patient initiates the therapeutic plan with successful treatment. She is rare in the education and clinical circles. I always learn from her blogs, conversations, case studies, and lectures. She is an outstanding educator and functional medicine physician.

P. Michael Stone, M.D., M.SCertified Functional Medicine Clinician

I am so happy to have found Dr. Fitzgerald, Romilly and Rhonda who all care about my well being. My life has changed for the better and I will continue whatever staff recommends so I can enjoy my family and feel great.

Victoria O

I wanted to find the root cause for my health concerns, to treat the primary cause and not the symptoms. Dr. Fitzgerald’s approach is radically different. She is tuned in to me. She responds to me within 24 hours. The intimacy of working with Dr. K is different than the yearly physical.

John J

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KARA FITZGERALD, ND
DR. KARA FITZGERALD, LLC
KF EDUCATION & CONSULTING, LLC

The New Frontiers Functional Medicine & Nutrition Clinic is located in the Sandy Hook Village section of Newtown, Connecticut in Fairfield County, Connecticut.
  • Phone:
    (203) 304-9502
  • Fax:
    (203) 304-9503
  • Address:
    27 Glen Road, Sandy Hook CT 06482

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IFM Certified Practitioner

Kara Fitzgerald, ND, Naturopathic Doctor is a certfied practitioner with The Institute for Functional Medicine.

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In this conversation, @Montel_Williams shares the In this conversation, @Montel_Williams shares the moment he realized something was actually shifting in his energy levels after starting mitochondrial support with @MitoQ.

We also discuss the connection between inflammation, mitochondrial function, and neurodegenerative conditions like MS and why supporting cellular energy may matter more than we once realized.

This is a powerful conversation about resilience, healing, and the evolving science of mitochondrial medicine.

Comment MONTEL and we’ll DM you the link to the episode, or visit https://www.drkarafitzgerald.com/2026/05/15/montel-williams-mitoq-ms-resilience/. 

#MultipleSclerosis #MSAwareness #Mitochondria #MitoQ #Inflammation #HealthyAging #LongevityMedicine #FunctionalMedicine
Most people think there is one “best” diet for lon Most people think there is one “best” diet for longevity. But the science shows something very different. Following generic trends or influencer driven protocols can actually move you further away from optimal health if they are not aligned with your biology.

In this episode of @extend_podcast, I sit down with @darshanshahmd to explore why personalized nutrition matters more than any trending diet. I explain how fasting protocols, restrictive diets, and one size fits all approaches can backfire, and why longevity nutrition must be tailored to the individual.

We also cover:
 ➡️ Why influencer driven diets often fail
 ➡️ The risks of stacking restrictive protocols like fasting and carnivore
 ➡️ Why bio-individuality is key in longevity nutrition
 ➡️ How nutrient diversity supports epigenetic health
 ➡️ Why the right diet depends on your biology, not trends

🎧 Listen to Episode 160: Dr. Kara Fitzgerald on Biological Age, Epigenetic Clocks, and the Future of Aging Reversal on Apple Podcasts or Spotify.
When we’re young, our bodies are incredibly effici When we’re young, our bodies are incredibly efficient at building muscle.

We can take in almost any amino acids (yes, even from less-than-ideal sources) and put them to work.

Muscle growth is responsive. Forgiving. Easy.

But over time, that changes.

We develop what’s called muscle anabolic resistance, a reduced sensitivity to the muscle-building effects of protein.

Same protein intake. Different response.

Which means:
→ We need more intentional protein intake
→ We need the right nutrients to support muscle synthesis
→ And we need to prioritize muscle as a key part of healthy aging

This is one of the most overlooked shifts in midlife physiology.

Also, a small exhale for the parents out there: kids are naturally in a highly anabolic state.
They don’t need perfection. They’re doing more with less.

We, on the other hand?

We need to be a little more strategic.

COMMENT ANABOLIC or head to https://www.drkarafitzgerald.com/2026/04/21/overcome-muscle-anabolic-resistance-nutrients-aging/ for the full blog. 

#HealthyAging #MuscleHealth #Longevity #ProteinIntake #WomensHealth #FunctionalMedicine #MidlifeHealth #StrengthTraining #AgingWell
We’re very good at naming diseases. Less good at a We’re very good at naming diseases. Less good at asking what’s driving them.

There’s a mechanism showing up across the literature, linking iron dysregulation, lipid damage, and chronic disease progression.

And most clinicians still aren’t looking for it.

It’s called ferroptosis.

And it may be sitting underneath what we diagnose as:
 • metabolic dysfunction
 • fatty liver disease
 • cardiovascular decline
 • cognitive aging

This isn’t just another pathway.

It’s a pattern, one that may help explain why some patients don’t fully respond…and where we may be missing intervention opportunities.

Join Dr. Stephanie Venn-Watson and me from @fatty15 as we break it down:
✔ How ferroptosis shows up clinically
 ✔ What to look for (including key biomarkers)
 ✔ Where it fits into chronic disease progression
 ✔ Why this may represent a correctable deficiency state
 ✔ What emerging strategies could look like in practice

If you’re thinking, “this might explain a few of my patients…” you’re probably right.

👉 Save your spot. Comment ferroptosis and we’ll DM you the link or head to https://www.drkarafitzgerald.com/2026/05/04/ferroptosis-aging-biomarkers-treatment/ to register
It’s not A1C. Not LDL. It’s Lipopolysaccharide (LP It’s not A1C.
Not LDL.
It’s Lipopolysaccharide (LPS).

An endotoxin that enters circulation when gut barrier function is compromised, quietly driving systemic inflammation.

And the data are hard to ignore:
→ In a 9-year cohort, LPS was the only biomarker that predicted both the presence and severity of anxiety and depression
 → Tracks with progression from prediabetes to diabetes
 → Drives hypothalamic inflammation → central insulin resistance
 → Associated with chronic low-grade inflammation and even skin conditions like acne

In women, this becomes especially relevant.
As estrogen declines in peri- and menopause:
 ↓ microbiome diversity
 ↑ intestinal permeability
 ↑ LPS translocation
Shifting the body toward a more inflammatory, catabolic state.

LPS isn’t just a marker. It’s a signal.

And if you’re not addressing it, you may be missing a root driver of metabolic and neurological decline.

COMMENT NITRIC or head to https://www.drkarafitzgerald.com/2026/05/05/perimenopause-gut-cardiovascular/) for my full conversation with @kiranbiome from @calroyhealthsciences. 

#FunctionalMedicine #LongevityScience #GutHealth #Microbiome #Inflammation #Perimenopause #HealthyAging #PrecisionMedicine #MetabolicHealth #BrainHealth
This website is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician with any questions regarding a medical condition.
Dr. Kara Fitzgerald

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Dr. Kara Fitzgerald, ND

Dr. Fitzgerald is an internationally-recognized expert clinician, as well as nationally-bestselling author, who is actively engaged in clinical research on epigenetics and longevity using a diet and lifestyle intervention developed in her research and practice.

She has published two clinical studies on the potential bioage-reversing effects of an 8-week DNA methylation-supportive diet and lifestyle in middle-aged men and women in the journal Aging. She continues to lead the conversation around interventions for healthy aging and their extensive potential in improving individual and population level disease burdens, while also providing evidence-based and practical advice that cuts through the hype.

Dr. Fitzgerald is on faculty at the Institute for Functional Medicine (IFM), is an IFM Certified Practitioner, and lectures globally on functional medicine, longevity, and epigenetics to practitioners and consumers.

She maintains an award-nominated podcast series ranked in the top 1% of global podcasts by Listen Score, New Frontiers in Functional Medicine, and an active blog and Clinic Immersion webinar series through her website, www.drkarafitzgerald.com.

Follow Dr. Fitzgerald on Instagram: @drkarafitzgerald

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