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Dr. Kara Fitzgerald
Individualized Evidence Based Integrative & Functional Medicine
Dr. Kara Fitzgerald Dr. Kara Fitzgerald
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  • About
    • Dr. Kara Fitzgerald
    • Our Team
    • Press
    • Publications
    • Testimonials
    • Careers
  • Learn
    • Newsletter
    • Blog
    • Podcast
    • Webinars
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  • YOUNGER YOU
    • Practitioner Training
    • What is Younger You
    • Books
      • Younger You book
      • Better Broths book
    • Discover Your Bio Age
      • Bio Age Quiz (BASA) – FREE
      • Bio Age Lab Test
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      • 1-1 Clinic Support
      • For Businesses
    • Supplements
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    • Our Clinic
    • New Frontiers Clinic Services
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    • Getting Here
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All Blogs

Lancet Revises Editorial Policy Following Scandal Over Hydroxychloroquine Study

September 25, 2020

Three months ago, the prestigious medical journal The Lancet published, and then later retracted, a study on the use of hydroxychloroquine for COVID-19. The retraction was prompted by questions that were subsequently raised about the integrity of the data used…

Natural Interventions to Lower Furin Levels As a Factor in SARS CoV-2 or Role of Furin Proteases in COVID 19 & Therapeutic Interventions

September 25, 2020

Elevated furin levels are not only associated with Covid-19 but also linked to comorbidities including diabetes, obesity, and hypertension – perhaps one reason why these comorbidities are linked with worse COVID-19 outcomes. In this peer-reviewed publication, Dr. Kara Fitzgerald discusses the…

Increased Coffee Intake Linked to Survival in Patients with Advanced or Metastatic Colorectal Cancer

September 25, 2020

Coffee may benefit those with advanced or metastatic colorectal cancer. A study of over 1100 patients published in JAMA Oncology found significant associations for both caffeinated and decaffeinated coffee with decreased cancer progression and increased survival. Researchers found that participants who drank…

Inflammatory Diet and High BMI Increase Risk of Knee Osteoarthritis

September 25, 2020

We know that an anti-inflammatory diet is linked to improvements in a variety of symptoms and conditions. A new prospective cohort study of nearly 5,000 individuals, over 1200 of whom developed knee osteoarthritis (OA) during the study period, offers excellent data…

The Nuances of Leaky Gut as a Contributor to Chronic Illness

September 16, 2020

Reviewed by Romilly Hodges (October 2020) Leaky gut is often written and talked about as a black and white concept: Either you have it or you don’t. And if you have it, you’ll want to ‘heal’ it. While this is…

Boost your Vitamin D Levels to Reduce COVID-19 Risk

September 10, 2020

Vitamin D is a superstar nutrient for supporting the immune system and reducing the risk of a cold, flu and acute respiratory tract infection. Researchers are now linking low vitamin D status (less than 20 ng/mL or 18 pg/mL, respectively) to an increased risk…

Myocarditis Symptoms in One-Third of Big Ten Athletes Positive for COVID-19

September 10, 2020

UPDATE: A clarification was issued by Penn State university the doctor was unintentionally citing outdated numbers. “During his discussion with board members, (Sebastianelli) recalled initial preliminary data that had been verbally shared by a colleague on a forthcoming study, which unbeknownst…

FDA Again Flags N-acetylcysteine as a Drug Not a Supplement

September 8, 2020

While it’s great it’s being studied for COVID, N-acetylcysteine (NAC) is again being flagged by FDA as a potential drug not a supplement. Seven companies selling NAC for alcohol hangovers received warning letters from FDA stating NAC is an unapproved new drug…

Eating Too Quickly? You’re Increasing Your Risk for Metabolic Syndrome

September 8, 2020

You’ve likely heard of the many reasons to eat slowly, including improved digestion, increased satiety, decreased overeating, and even weight loss. But did you know that eating too quickly can contribute to a higher risk of developing metabolic syndrome (MetS)?…

Natural Fertilizers Tryptophan & Glycine Increase Nutrient Density of Apples

September 8, 2020

We know that chemical fertilizers are harmful to us and the environment, but are there good alternatives? This new study comes up with an intriguing option! The known effects of chemical fertilizers include an increased risk of cancer, impaired fetal brain development,…

Bifidobacterium Adolescentis Strains Identified as GABA-Producers

September 5, 2020

Several mood-altering human neurotransmitters originate from microbes in the digestive tract. Now science is starting to dig into which bacterial strains are responsible.

Th17

A Few Surprises About Ketogenic Diets and Their Effects on the Microbiota and Th17

September 5, 2020

As you know, here at drkarafitzgerald.com we like to push the boundaries of what we know, and sometimes this means being a little contrarian. In this blog, our Nutrition Director, Romilly Hodges CNS takes us on a tour of some…

Sweet Potato Cauliflower Curry

Sweet Potato Cauliflower Curry

September 4, 2020

I’m cooking the rainbow and making colorful, nutrient-dense meals to help support and strengthen our immune defense.

Not a Recommended COVID Remedy – Oleander Plant Linked to Serious Side Effects, Including Death

August 27, 2020

Following the recently-reported news that oleandrin, an extract of the oleander plant, may combat COVID-19, the nonprofit American Botanical Council (ABC) issued a concerned warning about oleander, raising the alarm about the plant’s substantial toxicity.

Woman with stomach pain after eating,Hand female holding her belly,Food poisoning,Digestion problems,Close up

Eosinophilic Esophagitis (EOE): A Deeper Look at Antecedents, Triggers, and Mediators

August 27, 2020

My first EOE patient in the early 2000’s was fortunately, already diagnosed by a very savvy Yale gastroenterologist. I hadn’t heard of EOE at that time, but quickly learned about this highly challenging and potentially disabling mixed IgE allergic condition.…

Uterine Fibroids – New Bill Aims to Increase Research and Education Funding

August 25, 2020

Wow! (forehead slap) Of course we need funding for this sometimes tough-to-treat but ubiquitous condition. It wasn’t too long ago that fibroids were a much less common entity. Now, sadly, they are nearly ubiquitous.  A new bill introduced by Senator…

BPA Exposure Increases Risk of Death from Any Cause

August 25, 2020

There has been a wealth of research on the negative health effects of Bisphenol A (BPA) exposure. However, very little research has looked at long-term health outcomes. This study, published in the top tier JAMA Network Journal, serves as a…

Microscope in laboratory

Hidden in Plain Sight: The Skin Microbiome and Gut-Brain-Skin Axis

August 21, 2020

When you hear “microbiome,” you may think of gut bacteria first. Cutting-edge research, however, shows that the skin biome is another vital population of microorganisms that influences human health in surprising ways. From 2009 to 2019, the annual number of…

Workspace: Team Of Diverse Workers Put Hands Together

Functional Medicine, COVID-19 & Racial Disparities: Bridging the Gaps Webinar

August 14, 2020

I am so grateful for the participation of the panel in the roundtable discussion on Bridging the Gaps in Functional Medicine, COVID-19 & Racial Disparities.

The Utility of a Low Nickel Diet in Refractory Celiac Disease

August 14, 2020

A low nickel diet may be helpful for refractory Celiac Disease symptoms, according to this new study, published in the journal Nutrients. Especially if other contributors such as positive food IgE, SIBO, IBD, H pylori, and lactose intolerance have been…

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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.
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    (203) 304-9502
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    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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While brain volume and plasticity naturally declin While brain volume and plasticity naturally decline over time, new research suggests that creativity may help slow that clock.

A study using machine learning and brain imaging found that experts in creative pursuits, like tango dancers, musicians, artists, and even gamers, had “younger” brains than their non-expert peers, in some cases by as much as 6 years.

Even short-term learning made a measurable difference, reducing the brain’s age gap by more than 3 years.

The takeaway? Creativity keeps the brain young.

Engaging in skill-based, multisensory activities strengthens neural networks, boosts BDNF (a key molecule for brain plasticity), and enhances resilience across motor, cognitive, and emotional domains.

You don’t have to be a professional. The brain doesn’t care what you practice, only that you keep learning.

🎨 Dance, play, write, create. Your brain will thank you for it.

Source: https://doi.org/10.1038/s41467-025-64173-9

#Neuroplasticity #FunctionalMedicine #BrainHealth #Creativity #BDNF #HealthyAging #LongevityScience #FunctionalLongevity #CognitiveHealth
Functional medicine is longevity medicine. When we Functional medicine is longevity medicine. When we address the root causes of disease, we’re already slowing biological aging.

In this clinician spotlight, @drdarisaespinal shares how she integrates methylation mapping, SNP interpretation, and biological age tracking into everyday practice, and how these tools help her move patients from symptom management to measurable health optimization.

Her case results are remarkable: metabolic repair, improved thyroid antibodies, reduced HbA1c, and renewed vitality, all through personalized, systems-based care.

For clinicians, this is the next frontier: using the language of longevity to validate what functional medicine already does best.

Read how Dr. Espinal is transforming outcomes through root-cause, data-driven care. Comment ESPINAL and we’ll DM you the link, or head to https://www.drkarafitzgerald.com/2025/10/22/darisa-espinal-root-cause-longevity-medicine/ to read more. 

#FunctionalMedicine #LongevityMedicine #RootCauseMedicine #ClinicalLongevity #Epigenetics #Healthspan #BiologicalAge #Methylation #YoungerYou
Most people are trying to hack their biology by co Most people are trying to hack their biology by copying someone else’s routine.

But your genes aren’t generic, and your health shouldn’t be either.

Join me and @thednaco on November 6 at 6 PM ET for a live conversation on how to move beyond mainstream biohacking and into a new era of personalized performance through functional genomics.

Because the smartest “biohack” isn’t another gadget. It’s understanding your own code.

Comment THE DNA CO and we’ll DM you the link to register. 

#FunctionalMedicine #Epigenetics #Biohacking #LongevityScience #FunctionalGenomics #DrKaraFitzgerald #YoungerYou #PersonalizedMedicine #TheDNACompany
Every clinician knows that moment when the system’s demands collide with human limits.

For Dr. Stubbs, founder of @RootedFemme, it became the inflection point that led her to root-cause medicine.

In this conversation, we talk about:

 ⚕️ Why clinician burnout is a metabolic and mitochondrial issue as much as an emotional one
 🧬 How systems medicine restores not only patient health, but practitioner vitality
 💡 Practical steps for reclaiming energy, purpose, and joy in medicine

This is one of the reasons we lean on @VibrantLabs for accurate, fast, comprehensive diagnostics that give clinicians time back so their bandwidth is spent on care… not chasing labs, data, or workflow chaos.
This is a conversation for those who love medicine but refuse to lose themselves in it.

🎧 Comment ROOTED FEMME and we'll DM you the link for the full episode, or head to https://www.drkarafitzgerald.com/2025/11/04/sustainable-longevity/. 

#FunctionalMedicine #ClinicianBurnout #LongevityMedicine #SystemsBiology #RootCauseMedicine #WomenInMedicine
I’m excited to share that our colleague @romilly I’m excited to share that our colleague @romillyhodges will be speaking at the upcoming ENER-G Evidence-Based Nutrition Workshop, a free, grant-funded educational event hosted by @nunm_edu.

Romilly will be presenting a fascinating case she and I worked on together, recently published in Case Studies in Integrative and Functional Nutrition (ed. Angela Walker).

This event is an incredible opportunity to explore the clinical applications of functional and integrative nutrition, grounded in science, shaped by collaboration, and open to all clinicians and nutrition professionals.

🗓️ November 16, 2025, at 9:10 am
 🔗 Register free: nunm.edu/events/evidence-based-nutrition-workshop

#FunctionalMedicine #IntegrativeNutrition #ClinicalNutrition #EvidenceBasedPractice #Healthspan #FunctionalMedicineEducation #NutritionScience
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

© 2025 Dr. Kara Fitzgerald, LLC | Site by Yakadanda

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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.

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