Functional Medicine in Newburyport
Feel off, but keep hearing your labs are “normal”?
What is functional medicine?
Functional medicine looks for the root causes behind how you feel, not just the symptoms. At TruWellness, a physician-led team uses your history, advanced lab testing and body measurements to build one personalized plan for your whole body.
- Physician-led: Dr. Mark Su, MD, FAAFP
- Root-cause, whole-body approach
- Advanced lab testing
- One personalized plan
Medically reviewed by Dr. Mark Su, MD, FAAFP, Medical Director · Updated October 2026
What is functional medicine at TruWellness?
Functional medicine is a root-cause, whole-body approach to care. Instead of treating each symptom on its own, we look at how your hormones, metabolism, nutrition, sleep, stress and activity connect, then use testing to guide a plan built for you.
Many people come to us after months or years of feeling tired, foggy or “not themselves,” even though a standard checkup came back fine. Functional medicine takes a wider view. We spend time on your history and goals, look at your body as one connected system, and use advanced testing to look for what may be holding you back.
Care is led by our medical director, Dr. Mark Su, MD, FAAFP, a board-certified family physician whose clinical interest focuses on the causes of chronic inflammation. Functional medicine at TruWellness works alongside your primary care provider, not in place of them.
Who is functional medicine for?
Adults who want answers and a clear plan, especially if something feels off and you haven’t found the reason, or you want to be proactive about how you age.
- Low energy or fatigue that doesn’t improve with rest.
- Weight that won’t budge despite real effort with food and exercise.
- Possible hormone changes, such as perimenopause, menopause or low testosterone.
- Brain fog, poor sleep or stress that gets in the way of your day.
- Nutrition and digestion questions you want looked at as part of the bigger picture.
- Prevention and longevity goals: you feel fine and want to stay that way.
Functional medicine is not emergency care. If you have new, severe or sudden symptoms, contact your primary care provider, or call 911 in an emergency.
What can a functional medicine plan include?
Your plan draws on the testing and treatments we offer in-house, chosen for your results and goals. Not everyone needs every service.
AgeWell health optimization
Advanced testing, including biological age, heart and metabolic health and fitness, turned into a personal longevity plan.
TruVitality hormone optimization
Lab-guided bioidentical hormone therapy for women and men, built around your symptoms and your results.
TRT & HRT
Testosterone therapy (TRT) for men when lab testing confirms low testosterone, and menopause hormone therapy (HRT) for women.
Peptide therapy
When appropriate, select peptides such as tesamorelin, PT-141, oxytocin, glutathione and topical GHK-Cu, prescribed after a provider review.
TruTrim & GLP-1 weight loss
Medically supervised weight loss, including all FDA-approved GLP-1 medications when they are right for you. See GLP-1 weight loss.
Seca® body composition scan
A quick, standing scan that measures fat mass and muscle mass, so your plan tracks more than the number on the scale.
PNOE® VO2 max & RMR testing
Measures your cardiorespiratory fitness and resting metabolism in-house, to guide your exercise and nutrition.
IV therapy
Customized IV drips with fluids, vitamins and nutrients, given by our licensed clinical team.
Hyperbaric oxygen therapy
A non-invasive treatment that uses increased pressure to deliver more oxygen to your cells and tissues.
How does functional medicine at TruWellness work?
It starts with a medical consultation, moves to testing, and turns your results into one personal plan, with ongoing care from our team.
- Medical consultationMeet with a provider to talk through your health history, symptoms, medications and goals.
- TestingAdvanced labs and in-house testing, chosen for you, to look for root causes.
- Your planYour provider explains your results and builds one plan, which can include nutrition, exercise, sleep and stress strategies, and treatment when appropriate.
- Ongoing careYour care team stays with you, reviews your progress and adjusts the plan as your needs change.
From The Su TruReport
Evidence-based articles by Dr. Mark Su, MD, FAAFP, on topics related to this page.
The Best Supplement for Longevity? Dr. Su’s Four-Part Answer on Creatine, NAD, HRT and Biological Age Testing
Asked for the single best thing to take for longevity, Dr. Mark Su gives a four-part answer: creatine, NAD, HRT and biological age testing. He also explains why VO2 max matters.
Read article →
The Brain Health Playbook: Movement, Red Light, Hyperbaric Oxygen and Nutrition
Dr. Mark Su and Dr. Trevor Berry, a board-certified chiropractic neurologist, share four pillars of brain health: movement, red light and low-level laser, oxygen therapies like hyperbaric, and nutrition. Their message: don’t wait for symptoms to start.
Read article →
GLP-1 Weight Loss in Newburyport: Semaglutide & Tirzepatide
Dr. Mark Su answers the questions people actually ask about GLP-1 medications in plain English, including the difference between semaglutide and tirzepatide.
Read article →Meet your providers
Dr. Mark Su, MD, FAAFP
Medical Director
Board-certified in Family Medicine and in practice since 2003. His specialty of interest focuses on causes of chronic inflammation.
Mary Ramsey Stuckey, PA‑C
Physician Assistant (PA‑C)
Her focus has grown into functional medicine, with particular interest in nutrition, gut health and hormones.
Functional medicine: common questions
What is functional medicine?
Functional medicine is a root-cause, whole-body approach to health. At TruWellness in Newburyport, MA, it means a physician-led team looks at how your hormones, metabolism, nutrition, sleep, stress and activity connect, uses testing to understand what is going on, and builds one personalized plan.
How is functional medicine different from a regular checkup?
A routine checkup focuses on standard screenings. Functional medicine spends more time on your history and goals, adds testing when it is appropriate, and connects the results into one plan. It works alongside your primary care provider, not in place of them.
What tests might be included?
It depends on you. Testing can include advanced blood work, hormone testing, biological age testing through AgeWell, a Seca® body composition scan and PNOE® VO2 max and RMR testing. Your provider recommends only the tests that fit your goals.
Do you offer hormone therapy and GLP-1 medications?
Yes, when they are right for you. Hormone care, including testosterone therapy (TRT) and menopause hormone therapy (HRT), is provided through TruVitality after lab testing. Medical weight loss through TruTrim can include all FDA-approved GLP-1 medications.
How much does a functional medicine consultation cost?
A medical consultation at TruWellness is $200. The cost of testing and treatment depends on what your plan includes, and your provider will go over it with you.
Who provides functional medicine care at TruWellness?
Care is overseen by Dr. Mark Su, MD, FAAFP, Medical Director and a board-certified family physician, together with Mary Ramsey Stuckey, PA-C, whose focus includes functional medicine, nutrition, gut health and hormones.
Ready to look at the whole picture?
Book a medical consultation at TruWellness in Newburyport and start with a plan built around your history, your results and your goals.
TruWellness · 255 Low Street, Suite 303, Newburyport, MA 01950 · Monday to Friday, 9:00 am to 5:00 pm
This page is for general education and is not medical advice. Functional medicine at TruWellness does not replace emergency care or your primary care provider. Testing and treatment plans are personalized after a consultation with a provider, and individual results vary. Medically reviewed by Dr. Mark Su, MD, FAAFP, Medical Director.
