Welcome to MK Natural Health Services
I’m Mark Kibyuk, a Naturopath practicing in St. John’s, NL.
My passion is helping people solve the root causes of their health struggles from digestive issues and food sensitivities, to hormone imbalances, allergies, and long-term fatigue.
In my practice, I use a blend of lifestyle changes, nutrition, supplements, and modern functional testing to create plans that are practical and effective.
We’re living in an exciting time for health innovation and I love translating those breakthroughs into real results for my clients.
What You Can Do Here
Explore my services and consultations
Learn about the technology and testing I use
Book an appointment online
Order professional-grade supplements through trusted suppliers
Stay connected with my latest blogs and social feeds
Invite me to deliver a workshop or lunch & learn at your workplace
📍 Location: 87 Water St., St. John’s, NL, A1C 1A5
📞 Call: (709) 743-7168
The Four Areas I Help Most
I focus on the issues that affect my clients most: gut health, energy, mood, and hormone balance. My approach is simple: find the root cause, use testing when needed, and create a plan that actually works in real life.
Gut Health
Bloating, gas, cramping, constipation, diarrhea these aren’t just annoying symptoms, they’re signs your digestive system is struggling. When your gut isn’t working properly, it affects your energy, mood, hormones, and overall health.
I take the guesswork out of gut health. Instead of chasing quick fixes, I help you:
Identify the real reasons for your digestive issues (food sensitivities, microbiome imbalance, low stomach acid, inflammation).
Use advanced testing when needed to get clear answers.
Build a practical, step-by-step plan to repair your gut lining, rebalance bacteria, and restore proper digestion.
The result? Less pain, less stress around food, and more freedom to enjoy life without worrying about your belly holding you back.
No Energy
If you wake up tired, rely on caffeine to function, or crash halfway through the day, your body is telling you something. Fatigue isn’t a character flaw, it’s a sign of deeper imbalances.
I help you get to the bottom of low energy by looking at:
Blood sugar regulation and adrenal stress
Nutrient deficiencies that drain your system
Thyroid and hormone shifts that slow metabolism
Hidden gut or inflammatory triggers that sap vitality
Instead of quick fixes, I create a plan that restores lasting energy so you can think clearly, stay productive, and actually enjoy your day without running on fumes.
Hormone Imbalances
Hormones affect everything. Mood, weight, sleep, energy, and even digestion. When they’re out of balance, you feel it in every part of your life.
I help identify and correct common imbalances, including:
PMS, perimenopause, and menopause symptoms
Thyroid dysfunction and adrenal fatigue
Testosterone decline in men
Cortisol imbalances tied to chronic stress
By addressing the root cause, I create a personalized plan to bring your hormones back into balance. So your body works with you, not against you.
Mood Changes
Anxiety, low mood, and constant stress aren’t just “in your head.” They’re often linked to nutrient deficiencies, gut imbalances, and hormone shifts that change brain chemistry.
I help connect the dots by assessing:
Gut–brain axis issues that affect serotonin and GABA
Nutritional gaps that influence mood stability
Stress chemistry and cortisol imbalance
Hormone shifts that drive irritability or sadness
The goal isn’t masking symptoms it’s restoring balance so you feel calmer, more resilient, and more like yourself again.
Gut, energy, mood, hormones they’re all connected. When one is off, everything feels harder.
The good news? With the right support, they can all be brought back into balance.
Your Health Questions, Answered
Check out the latest articles on gut health, hormones, and fatigue written to help you take real action.
Feel Better with Our Most Popular Supplement Kits
At Mark Kibyuk Natural Health Services we don’t guess, we TEST. The human body is just too complicated to guess about ailments and treatments. Using functional labs to understand what is happening behind the symptoms is KEY to creating a plan of action which can lead to success. We pride ourselves on providing the highest level of testing available in North America to properly assess what the underlying cause of degrading health is and recommend the best clinical path forward. We only use accredited medical laboratories that focus on patient well-being, to build strong collaborative relationships with clinicians and advance the science of wellness. Please set up a consult with us to properly assess your health concerns and set up a path forward.
The tests used most at my clinic would be:
Organic Acids Test (OAT)
The Organic Acids Test is an easy at-home urine test that gives deep insight into your metabolism, gut balance, vitamin status, and energy production. It’s one of the most comprehensive ways to uncover hidden imbalances affecting mood, energy, and overall health.
Use this test if you struggle with:
Chronic fatigue or poor sleep
Mood or mental health challenges
Autism spectrum support needs
Autoimmune issues or chronic illness
Digestive concerns (candida, clostridia, bacteria)
Vitamin D Test
Vitamin D deficiency is common in Canada and strongly linked with heart disease, cancer risk, autoimmunity, mood issues, and low energy. This simple blood test checks your Vitamin D3 levels and helps guide the right supplementation to reach (and confirm) your optimal range.
Use this test if you:
Have fatigue, low mood, or anxiety
Struggle with frequent illness or autoimmune conditions
Have a family history of heart disease, stroke, or cancer
Want to track and optimize your Vitamin D supplementation
Gut Health Stool Tests (GI-MAP & GI Effects)
These advanced stool tests give a detailed picture of your gut microbiome. Bacteria, yeast, parasites, inflammation, digestion markers, and more. They help uncover the root causes of bloating, gas, cramping, food sensitivities, and chronic gut issues.
Use these tests if you:
Struggle with ongoing bloating, gas, or cramping
Suspect candida, parasites, or bacterial imbalance
Have IBS, IBD, or unexplained gut symptoms
Want answers after trying diets or supplements with no success
Think of these tests as the treasure map you’ve been looking for guiding you straight to the source of your gut health problems.
Endo Plus Hormone Panel
The Endo Plus Panel is a comprehensive saliva and urine test that evaluates key hormones including estrogen, progesterone, testosterone, cortisol, and DHEA. It helps identify imbalances that can affect energy, mood, weight, menstrual cycles, and long-term health.
Use this test if you:
Struggle with PMS, irregular cycles, or perimenopause/menopause symptoms
Have fatigue, sleep problems, or stress burnout
Notice mood swings, anxiety, or low motivation
Suspect low testosterone, estrogen dominance, or adrenal dysfunction
Want a complete picture of your hormone health before choosing treatment
If you’ve been wondering whether hormones are behind your symptoms, this panel is the roadmap to answers and balance.
Adrenocortex Stress Profile (with Cortisol Awakening Response)
This saliva-based test measures cortisol and DHEA throughout the day to assess your stress response (HPA axis). It reveals whether your adrenals are functioning normally, burned out, or overactive and how stress may be affecting your energy, mood, sleep, and metabolism.
Use this test if you:
Feel tired but wired, or struggle with fatigue and poor sleep
Have trouble handling stress or notice mood swings
Struggle with weight gain, blood sugar crashes, or cravings
Experience ongoing pain, inflammation, or frequent illness
Suspect adrenal burnout or cortisol imbalance
Think of this test as your stress blueprint showing exactly how your body is coping, and where it needs support to build resilience.
Online Appointment Scheduling
Detox Questionnaire
IdentiT Stress Assessment
My Top Recommended Tools & Resources
Simple supports I use and trust to help you feel your best.
(Click on the links for more information)
Supports I Love
Squatty Potty → Better posture = easier bathroom habits.
Kala Red Light Therapy → Boost energy and recovery at home.
LMNT Electrolyte Packs → Stay hydrated with clean minerals, not sugar.
Metagenics Supplements → Professional-grade nutrients you can rely on.
Red Light Bulbs (Bedroom) → Support circadian rhythm and deeper sleep.
Gut & Digestion Supports
Digestive Enzyme Starter → for people who struggle with bloating and heaviness after meals.
Probiotic (broad-spectrum) → foundational gut support.
Blender Bottle / High-Speed Blender → for smoothies as quick nutrition.
Collagen Powder → gentle protein that supports gut lining and skin.
Books That Inspire Me
Clean Gut (Alejandro Junger, MD) → Healing the gut from the inside out.
Hashimoto’s Protocol (Dr. Izabella Wentz) → Autoimmune thyroid recovery guide.
Boundless (Ben Greenfield) → The ultimate biohacking reference.
Why We Sleep (Dr. Matthew Walker) → Transform your energy through sleep.
Guides To Support You
Collagen User Guide- Learn how to choose the right collagen, when to use it, and how it supports gut, skin, and joint health.
How to Get Kids to Eat More Veggies- Tried-and-true strategies (and sneaky recipes) to get more greens into picky eaters.
Building a Better Lunch Box-Smart, kid-friendly lunch ideas that balance nutrition, energy, and taste no stress required.
Social
Let's Get Serious About Inflammation
I see a constant stream of patients at my clinic and issues with inflammation are almost always a concern. Please watch our presentation on Inflammation and its effects that could be impacting your health!
Inflammation can cause a myriad of health issues in the body. Are you feeling depressed? Do you have stiff joints? Back pain? Digestive issues? Experiencing weight gain? Inflammation could be the cause. Watch our presentation on inflammation and its effects on the body.