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Dr. Kara Fitzgerald
Individualized Evidence Based Integrative & Functional Medicine
Dr. Kara Fitzgerald Dr. Kara Fitzgerald
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  • YOUNGER YOU
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  • About
    • Dr. Kara Fitzgerald
    • Our Team
    • Press
    • Publications
    • Testimonials
    • Careers
  • Learn
    • Newsletter
    • Blog
    • Podcast
    • Webinars
    • Research, News & Ideas
    • Case Studies
    • Recommended Links
    • FxMED Sponsored Education
  • Recipes
  • Store
    • REPORT: The Use of AI & Wearables in Functional & Longevity Medicine
  • Contact
  • 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
    • Programs
      • 10-Day Self-Paced Course
      • 1-1 Clinic Support
      • For Businesses
    • Supplements
  • Clinic
    • Our Clinic
    • New Frontiers Clinic Services
    • FAQ
    • Testimonials
    • Office Policies and Fees
    • Contact the Clinic
    • Getting Here
    • Patient Portal

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Gaia Pro Magnesium Glycinate 400

Gaia Pro Magnesium Glycinate 400

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Integrative Theraputics L-Theanine 200 mg

Integrative Theraputics L-Theanine 200 mg

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L-theanine is a constituent found in green tea, but without the stimulating effects. It can help promote relaxation and reduce stress without inducing drowsiness.*

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Pure Encapsulations Melatonin-SR

Pure Encapsulations Melatonin-SR

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Sustained-release melatonin to support healthy sleep*

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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

Find us on:

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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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Fatigue. Muscle loss. Slower recovery. These aren Fatigue. Muscle loss. Slower recovery. These aren’t just signs of aging. They’re often signs of mitochondrial decline. Mitochondria are central to energy production, resilience, and long-term healthspan. And one of the most exciting areas of research right now is mitophagy, the process that clears damaged mitochondria and restores cellular function. Join me live with Dr. Anurag Singh from @timeline_longevity for a deep dive into the clinical science behind Urolithin A, the postbiotic nutrient developed by Timeline® shown in human trials to support mitochondrial quality control. In this webinar, we’ll cover: • What Urolithin A is, and why most people can’t produce enough through diet • Why mitophagy is a critical longevity pathway • Key findings from human clinical trials • Which patients may benefit, and practical implementation considerations If you’re interested in precision longevity strategies rooted in cellular biology, this conversation is for you. Live attendees can join the Q&A. All registrants receive the replay. Comment Mitophagy and we’ll DM you the link to the register, or head to https://www.drkarafitzgerald.com/2026/02/27/webinar-timeline-urolithin-a-mitochondrial-function/ to reserve your spot!
Spring Forward, Biology Pushes Back ⏰🧬 This weeke Spring Forward, Biology Pushes Back ⏰🧬 This weekend we “spring forward” and lose an hour of sleep. It may seem minor, but even a one-hour shift in circadian timing can ripple through multiple biological systems. Research links daylight saving time changes with temporary increases in: • Sleep disruption • Inflammation • Cardiovascular events • Mood disturbances • Metabolic dysregulation From a functional medicine perspective, this isn’t surprising. Our biology runs on circadian rhythms that regulate hormones, immune signaling, metabolism, and mitochondrial function. When sleep timing shifts abruptly, cortisol patterns, melatonin signaling, and glucose regulation can all be affected. The good news? A few small strategies can help support the transition: ☀️ Get morning sunlight within an hour of waking 🥗 Eat balanced meals at consistent times 🚶‍♀️ Move your body earlier in the day 📵 Dim lights and reduce screens in the evening 😴 Prioritize sleep for the next several nights Circadian health is foundational to longevity. Even small disruptions remind us how tightly our biology is linked to the rhythms of light, sleep, and time. #CircadianRhythm #FunctionalMedicine #LongevityMedicine #SleepHealth #MitochondrialHealth #Healthspan
A hip fracture is not just an injury. It’s often a A hip fracture is not just an injury. It’s often a turning point in overall health. Only 40–60% of people who experience a hip fracture ever regain their previous level of mobility. And within the first year, all-cause mortality rises to approximately 22%. Bone loss develops silently over years, driven by inflammation, hormonal shifts, immune signaling, and emerging evidence points to the gut microbiome as a key regulator of skeletal health. Protecting bone health isn’t just about preventing fractures. It’s about preserving independence, resilience, and longevity. In this episode with @solaria.bioscience, we explore the deeper biology of bone aging and why intervention must begin earlier. 🎧 Comment SOLARIA BIO or head to https://www.drkarafitzgerald.com/2026/02/24/endophytes-bone-health-bondia/ for the full episode. #BoneHealth #Longevity #Menopause #HealthyAging #FunctionalMedicine #Microbiome #OsteoporosisPrevention #WomensHealth #NewFrontiersFM
Sleep this way to protect your brain. 🧠💤 Sleep is Sleep this way to protect your brain. 🧠💤 Sleep isn’t passive. It’s active neurological maintenance. During deep sleep, the brain’s glymphatic system clears metabolic waste, including beta-amyloid proteins linked to cognitive decline and Alzheimer’s disease. Researchers found this clearance process becomes dramatically more efficient during sleep compared to wakefulness. This is one reason chronic sleep deprivation is associated with accelerated brain aging. Sleep is not lost time. It’s biological repair. Prioritizing sleep supports cognitive resilience, metabolic health, and longevity. Source: Xie L et al. Sleep drives metabolite clearance from the adult brain. Science. 2013;342(6156):373–377. https://pubmed.ncbi.nlm.nih.gov/24136970/
This is one of my favorite traditional remedies fo This is one of my favorite traditional remedies for immune support, and it’s deeply aligned with functional medicine principles. Fire Cider is a potent blend of apple cider vinegar, garlic, ginger, turmeric, horseradish, and herbs, ingredients rich in polyphenols and bioactive compounds that support immunity, healthy inflammation response, and cellular resilience. Many of these compounds act as epigenetic modulators, helping influence gene expression and support healthy aging at the cellular level. We often recommend taking a small amount daily, especially during times of increased immune stress or seasonal transitions. It’s simple. Food-based. And deeply supportive of whole-body physiology. Comment FIRE CIDER and we’ll DM you the link, or head to https://www.drkarafitzgerald.com/recipe/fire-cider/ for the full recipe. #FunctionalMedicine #FoodAsMedicine #ImmuneSupport #Epigenetics #Polyphenols #HealthyAging #RootCauseMedicine #DrKaraFitzgerald
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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