Specializing in Gut, Anxiety, and Metabolic Health

Jaclyn Rosen,
MS, CNS, CDN
Clinical Nutritionist

I help clients uncover the root causes of symptoms like bloating, fatigue, anxiety, inflammation, and hormonal shifts, so they can restore gut health, support mental well-being, and regain energy through personalized, whole-food nutrition.

Through my Essential Core4 Framework, I design evidence-based, individualized protocols that go beyond surface-level fixes, helping you restore balance, optimize function, and feel your best, inside and out.

Now accepting Aetna, Cigna, and out-of-network benefits for Anthem, NYSHIP, and UnitedHealthcare. Self-pay options are also available.

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Plant-Based Holistic Nutritionist & Lifestyle Coach

Welcome

Hi, I’m Jaclyn, a clinical nutritionist specializing in gut health, inflammation, and metabolic imbalances. I take a root-cause approach, using comprehensive lab testing, health history, and personalized protocols to uncover what’s driving symptoms like fatigue, bloating, anxiety, and weight gain.

With a unique focus on how nutrition supports mental health, mood, and stress, I guide clients toward sustainable energy, improved digestion, and whole-body balance.

My practice is grounded in fiber-forward, whole-food nutrition, habit-building, and science-backed strategies, like anti-inflammatory protocols, lifestyle integration, bloodwork analysis, and advanced nutrigenomic testing.

To provide a clear path forward, I developed the Essential Core4 Framework, a structured, four-pillar system focused on inflammation, metabolism, hormones, and gut-immune health.

This method helps uncover the deeper root causes of imbalance and guides the creation of targeted, evidence-based solutions that go beyond surface-level fixes.

While my approach centers on fiber-focused, nutrient-dense eating, I meet clients wherever they are, helping them build sustainable habits that align with their lifestyle and long-term goals.

Specialty Areas

My Essential Core4 Framework helps me assess and address the systems driving your symptoms. These are the key areas I specialize in supporting:

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Inflammation → Chronic inflammation, joint pain, skin issues, cardiometabolic inflammation, and liver detox support.

Metabolic Health → Blood sugar balance (prediabetes/diabetes), energy crashes, cravings, fatigue, high cholesterol, blood pressure, fatty liver, and sustainable weight loss.

Hormonal Health → Thyroid and adrenal support, women’s health (perimenopause), sleep, and stress resilience.

Gut Health → Bloating, constipation, food sensitivities, leaky gut, Candida, and SIBO.

Mental & Emotional Well-Being → Anxiety, mood imbalances, chronic stress, brain fog, and burnout.

Are You Ready?

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Here’s the thing: this is your one life. And while we all move at our own pace, staying stuck in cycles of fatigue, discomfort, or anxiety doesn’t serve you.

Every small step forward brings you closer to better health, more energy, and a life that feels lighter, calmer, and more aligned.

The truth is, time doesn’t wait. There’s no time machine when we’re anxious, inflamed, or overwhelmed. But here’s the good news: you don’t have to figure it out alone.

If you’re seeking more energy, less bloating, fewer mood swings, sustainable weight loss, clearer skin, or a calmer mind—and you want a real-life approach to eating well—then yes, you’re ready.

Do any of these sound like you?

“I’m tired of feeling bloated and puffy all the time. I just want to feel normal again.”

“I get anxious sometimes for no reason, and I have no idea how to calm down or feel in control.”

“My mood, sleep, and energy are all over the place, and I don’t feel like myself.”

“Every time I try to eat healthier, I end up overwhelmed by all the advice and give up.”

“I’ve been to doctors and done the labs, but I still don’t have answers or a real plan.”

“I just want a simple, doable way to eat that helps me feel better—without tracking every bite or cutting everything out.”

Take a breath, I’ve got you.

The Essential Core4 Framework

Most programs only scratch the surface. My Essential Core4 Framework goes deeper, helping uncover why you’re feeling bloated, tired, anxious, or stuck. By evaluating four key systems that influence mood, metabolism, and overall health, I create a step-by-step plan to restore balance and help you feel like yourself again.

1. Inflammation & Stress Response

Hidden inflammation and stress can show up as fatigue, brain fog, skin flare-ups, or anxiety. I assess how your body manages stress, toxins, and daily exposures, and support your natural detox and antioxidant systems so your body can calm inflammation and start healing from within.

2. Metabolism & Nutrient Status

Energy crashes, cravings, and slow progress with weight or mood often trace back to nutrient gaps and blood sugar imbalance.
We look at how your body uses and absorbs nutrients, then build a personalized plan with the right foods, supplements, and daily habits to steady energy and improve metabolism.

3. Gut & Immune Function

Your gut is central to digestion, immunity, and even mood regulation. I help identify underlying issues like bloating, sensitivities, or microbiome imbalance, then guide you in rebuilding gut health and immune strength so you can feel lighter, more comfortable, and more resilient.

4. Hormones, Mood & Energy

Your hormones and nervous system influence everything from sleep and stress to appetite and focus. Whether you’re navigating thyroid issues, adrenal fatigue, or perimenopause, I take a whole-body approach to help you support these systems naturally so you feel calmer, more balanced, and in control of your energy.

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What They’re Saying

  • "Before working with Jaclyn, I was feeling overwhelmed by my health, especially dealing with SIBO, mold exposure, and years of discomfort. I kept trying to figure things out on my own, but never really made progress. She was so attentive to what I needed and genuinely cared about me feeling better. Instead of overwhelming me, she broke everything down into simple steps that made the whole process feel way less stressful. I actually started to see progress that I hadn’t felt in years! I absolutely recommend Jaclyn to others; she’s compassionate, knowledgeable, and truly cares. If someone is struggling or feeling lost in their wellness journey, I’d tell them that working with Jaclyn was one of the best decisions I’ve made."

    -Julia F. (Greenville, Texas)

  • "I am so glad I found Jaclyn. After a lifetime of eating fast convenience food (Big Macs and French fries), poor sleep habits, and little to no exercise, I was stressed out, tired, and overweight. In other words, I was a mess! She got me back on track. She started by really listening to me and personalized my coaching plan based on my lifestyle goals and preferences. She really listened to me and created some simple, nutritious dinner templates that helped me cook quick meals I love to eat. She also encouraged me to experiment to find a simple daily movement that I loved to do. I feel better, with more energy, and a sense of positive control over my life and my health."

    -Rebecca G. (Lithia, Florida)

  • “The most important thing to know about working with Jaclyn is how non-judgmental she is. She brings years of experience and science-based knowledge, but her calm, caring approach is just as valuable.

    Jaclyn helped me learn how to make simple swaps for our family’s favorite meals and how to shop more mindfully, paying attention to things like sodium and processed foods.

    I lost 4 pounds in one month, and my palate changed; refined sugar no longer tasted good! I’ve learned that changing lifelong eating habits is a process that takes time, but the benefits are worth it.

    I would definitely recommend Jaclyn’s coaching to anyone feeling overwhelmed and unsure how to put all the information into practice.”

    -Kelly B. (Sonoma, CA)

  • “At first, I had my doubts about introducing a fiber-rich diet, but I decided to try it for a month. The results were life-changing.

    When I started working with Jaclyn, I was eating meat, dairy, and eggs pretty often! I also did not sleep well, and "bragged" that I could take a nap at a red light because I was always tired.

    I kept a food journal and talked to Jaclyn regularly about different fiber-rich foods to eat. Total surprise to me, I wasn’t ever hungry.  After about three weeks, I felt much more alert during the day.  She gave me lots of meal ideas, snack ideas, and grocery lists. 

    As I write this, it’s been five months, and I feel so healthy, and I’m sleeping really well. My blood tests show my cholesterol is lower, and I am no longer taking daily pre-diabetic injections. A life change?  Yes! Worth the effort? Absolutely! I couldn’t have done it without Jaclyn, she’s amazing!”

     -Deborah G. (San Francisco, CA)

  • “When I started working with JacIyn, I was forgetful and a couch potato. Sometimes I became depressed and would try to “eat” my way out of it, that never works. Jaclyn started slow with me. I started vegetarian, then pescatarian and finally made the jump to whole food, plant-based. I was completely comfortable with her help & constant support. I loved her food swaps & recipe suggestions. She inspired me to stretch every morning and move my body every day. She changed my life for the better. I discontinued my breathing medicine, cut my diabetes medication in half and cut my blood pressure medication in half. I lost 50 lbs and my cholesterol is under 100.

    I feel stronger and have more energy. I am no longer a couch potato. This way of living will save your life like it did mine.”

    -Roland V. (Long Island, NY)

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