Functional Medicine
By White Onyx Functional & Aesthetic Medicine · Gardner, MA
Functional Medicine Beyond Symptoms
Healing begins at the root cause.
Your symptoms are signals. Your body is telling a story. If you’ve been told your labs are “normal,” handed another prescription, or left without answers, it may be time for a different approach.
At White Onyx Functional & Aesthetic Medicine in Gardner, MA, we provide personalized functional medicine that looks beyond symptoms to uncover what’s driving them. Through advanced testing, thoughtful evaluation, and individualized care, our Root Cause Reset program provides a data-driven roadmap to help identify what is impacting your health and create sustainable changes that support long-term wellness.
Whether you’re managing a chronic condition, looking to optimize your health, or seeking answers from the comfort of home through our secure telehealth appointments, we aim to help you feel your best from the inside out.
What Is Functional Medicine?
Your symptoms are telling a story.
Functional medicine is a client-centered, science-based approach to healthcare that focuses on identifying and treating the underlying causes of disease rather than simply managing symptoms. Instead of asking, “What medication treats this?” we ask, “Why is this happening?“
Every aspect of your health is connected. Nutrition, hormones, gut health, genetics, stress, sleep, environmental factors, and lifestyle all influence how your body functions.
At White Onyx, we take the time to consider your medical history, nutrition, hormones, metabolism, digestive health, sleep, stress, environment, and lifestyle to develop a more complete understanding of your health. Through our Root Cause Reset program, we use advanced testing and whole-body insights to uncover the factors affecting your health and develop a clear strategy to restore balance and build lasting wellness.
Looking deeper to help you feel your best.
You may know that something feels off even when routine testing has not provided clear answers. At White Onyx, we take a deeper look at your symptoms, health history, lifestyle, and laboratory findings to understand the patterns affecting your well-being.
We treat the whole person through a root-cause approach, identifying the core reasons behind your symptoms and chronic health issues. We want to help you achieve your highest quality of life so you can live life fully!
Functional medicine can help identify the root causes behind many symptoms, including the following…
Conditions & Symptoms We Help Address
White Onyx may be a good fit if you are experiencing:
- ^chronic fatigue & low energy
- ^chronic pain, joint pain, & inflammation
- ^persistent brain fog or difficulty concentrating
- ^chronic migraines or headaches
- ^depression, anxiety, or mood changes
- ^unexplained weight gain
- ^weight loss resistance
- ^hormone imbalances
- ^thyroid disorders
- ^chronic stress & burnouts
- ^sleep disturbances & insomnia
- ^low libido & sexual wellness
- ^menopause & perimenopause symptoms
- ^low testosterone
- ^digestive issues, gut health, and food intolerances
- ^poor physical performance and exercise recovery
- ^hair loss or hair thinning
If You’re Like Many of Our Clients…
Your Health Journey May Have Taken One of Three Paths:
Path 1
Conventional Medicine Failed You
- Labs were "normal" despite your symptoms
- Medications offered as a quick fix, not a real solution
- Fragmented approach overlooked the mind-body connection and missed the fully story
- You left appointments feeling dismissed, confused, and unheard
You knew something was wrong—but no one took the time to figure it out.
Path 2
Coaching Was Without Framework
- Testing was incomplete — possible causes were overlooked
- No medical oversight or plan—just guesswork and supplements
- Nervous system was never addressed—so the results didn’t hold
- You were given protocols, not a process. Leaving you confused, plateaued, or burned out.
You did everything right—but still didn’t feel fully better.
Path 3
You Made Progress—But You’re Not Free
- You’re afraid of 47 different foods
- One late night, bad meal, or stressful week throws you off
- You’re constantly tracking symptoms, triggers, and setbacks
- You watch others enjoy life while you micromanage every bite
- You’re scared your progress is always one step from unraveling
If healing made you more anxious and sensitive… that’s not healing.
It’s time for a Path with a Holistic Approach.
Here’s Why Functional Medicine is Different…
Our Approach
A collaborative path, built around you.
Healing isn’t a single appointment—it’s a process. Every functional medicine journey at White Onyx follows a thoughtful, personalized approach.
Listen
We begin with a comprehensive consultation (in-person or online) to understand your symptoms, medical history, lifestyle, nutrition, and wellness goals.
Discover
Using advanced laboratory testing and functional assessments, we identify underlying imbalances that may be contributing to your symptoms.
Personalize
Together, we create a treatment plan tailored to your unique needs, goals, and health history. As your body responds, we’ll refine your care to support lasting wellness.
Optimize
As your health improves, we’ll continue monitoring your progress and adjusting your plan to support long-term wellness and help you achieve your goals.
Why Choose White Onyx Functional Medicine?
Personalized care. Lasting wellness.
At White Onyx, functional medicine isn’t just another service—it’s the foundation of how we care for our clients.
We believe meaningful healing begins with listening. That’s why we take the time to understand your health history, lifestyle, and goals before creating a plan that’s uniquely yours. Whether you meet with us in person at our Gardner, MA office or through secure telehealth appointments, our approach combines evidence-based functional medicine, advanced testing, and compassionate care to help people throughout North Central Massachusetts and beyond move beyond symptom management toward lasting wellness.
When you become a client at White Onyx, you gain a partner committed to helping you understand your body and make informed decisions about your health for years to come.
Many paths. One philosophy.
Functional Medicine Services
Hormone Replacement Therapy (HRT)
Bioidentical hormone replacement therapy is designed to address fatigue, weight changes, brain fog, mood, low libido, and other symptoms of hormonal imbalance.
Medical Weight Loss
Move beyond restrictive diets with a root-cause approach to sustainable weight loss that combines advanced testing, personalized nutrition, and ongoing medical support in our functional medicine program.
Peptide Therapy
As part of our functional medicine approach, peptides may be used as a supportive tool to help promote healing, recovery, metabolism, healthy aging, and overall wellness—when appropriate for your individual needs.
Frequently Asked Questions
about Functional Medicine
What is the difference between functional medicine and conventional medicine?
Conventional medicine often focuses on diagnosing and treating diseases after they develop. Functional medicine looks deeper to identify the root causes contributing to illness and addresses them through personalized treatment plans that support long-term health.
What conditions can functional medicine help with?
Functional medicine may benefit patients experiencing hormone imbalances, digestive concerns, chronic fatigue, brain fog, inflammation, thyroid disorders, autoimmune conditions, weight-loss resistance, metabolic issues, and other chronic health concerns.
What is the Root Cause Reset program?
The Root Cause Reset is White Onyx’s structured functional medicine framework designed to help uncover the factors contributing to your symptoms and health concerns. Through advanced testing, personalized recommendations, and ongoing support, the program creates a roadmap focused on sustainable improvements rather than quick fixes.
Do I need advanced lab testing?
Not every patient requires the same testing. Dr. Tateoka recommends laboratory testing based on your symptoms, health history, and wellness goals to gather the information needed to create a personalized treatment plan.
How long does functional medicine take to work?
Every patient is different, and each person’s healing journey unfolds at its own pace. Some people begin noticing improvements within a few weeks, while others with more complex health concerns may require several months of ongoing care and support.
Functional medicine is a collaborative process—your practitioner provides expertise, guidance, and coaching, while your commitment and active participation play an important role in creating meaningful change. Together, we work to understand your health, address underlying factors, and adjust your plan as your body responds.
Can I receive functional medicine care through telehealth?
Yes. We can provide functional medicine services to anywhere in the US through secure telehealth appointments, making your care more accessible and convenient. Virtual visits allow us to discuss your health concerns, review lab results, and support your ongoing care from wherever you are, while in-person appointments remain available at our Gardner, MA office.
Does White Onyx accept insurance?
White Onyx does not participate with insurance plans and operates as a self-pay practice. This allows us to provide personalized care based on your individual needs rather than insurance limitations. Payment is due at the time of service. Upon request, we may provide a detailed receipt that you can submit to your insurance company for possible out-of-network reimbursement, although reimbursement is not guaranteed.
Care that fits your life.
Functional Medicine—In Person or Online
In-Person Appointments
Visit us in Gardner, MA.
Prefer face-to-face conversations? Visit our functional medicine office in Gardner, MA, where you can meet one-on-one with your provider in a comfortable, supportive environment. It's a great option for patients who value in-person connection.
Telehealth Appointments
Meet with us online.
Busy schedule? Live farther away? Our secure telehealth appointments make it easy to review lab results, discuss your progress, and receive ongoing guidance—all from the comfort and convenience of home. Available to anywhere in the US.
Feel like yourself again.
Functional Medicine
$99 Consultation
45-Minute Initial Consultation for:
▪ Weight Loss ▪
▪ Hormone Optimization ▪
▪ Functional Medicine / Wellness ▪
$99 fee can be applied towards a same-day purchase.
Start with a consultation—either at our office in Gardner, MA or online through telehealth. We'll listen first, then map the path that fits your life and your goals.
Financing Available
Flexible payment options for personalized care.
We believe personalized healthcare should be accessible. While White Onyx does not participate with insurance plans, we accept HSA and FSA payments when eligible. We also offer flexible financing options through CareCredit and Affirm, making it easier to begin care when you're ready.
We are a Certified
CareCredit Provider!
