Heal From Within Longevity (HFW) is a clinician-led longevity and health optimization practice with physician medical direction, based in Hillsdale, New Jersey, and delivered by telehealth. It exists for people who have been dismissed, rushed, under-tested, or told their symptoms are normal while their energy, hormones, gut, metabolism, mood, and recovery keep declining.
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100+ five-star reviewsClinician-ledTelehealthHSA/FSA acceptedHFW Longevity is a clinician-led, telehealth-native practice for patients who have been dismissed, rushed, under-tested, or told their symptoms are “normal” while their energy, hormones, gut, metabolism, mood, focus, recovery, and quality of life keep declining.
Clinician-Led
100% Telehealth
Nationwide
HSA/FSA Accepted
24 pages on advanced testing, clinician-led protocols, and why strategy comes before any single compound.
HFW was created to serve the space between reactive sick care and product-first optimization. Traditional care is essential for emergencies, acute care, and major disease, and it often lacks the time and structure to help healthy people act proactively, or to help patients whose symptoms do not fit a clear disease label. The optimization market has the opposite problem: it frequently sells peptides or medications before doing the work to find out whether those tools are appropriate for the person.
HFW is built around a different idea. Know the patient. Test when it can change a decision. Identify the real priorities. Use the least intervention reasonably necessary. Then track it, and keep going until progress lasts.
Not everyone at HFW is a doctor, and that distinction matters. Each person's role and scope is stated openly so you know who makes which decision about your care. Prescription decisions are evaluated and issued by an appropriately authorized HFW prescriber. Our Learn articles carry a named clinical reviewer and a review date. See our clinical review process →
Christina Warner, APN-CBoard-Certified Women's Health Nurse Practitioner. Advanced care clinician.Christina brings 25 years of clinical experience and a personal understanding of what it means to be dismissed by a system that does not always see the whole person. She conducts evaluations, reviews testing, develops and adjusts plans, and evaluates prescription eligibility within her licensed scope.
Focus: perimenopause and menopause; estrogen, progesterone, testosterone, thyroid, and cortisol patterns; fertility, preconception, pregnancy, and postpartum care; bioidentical hormone therapy; endometriosis and complex women's health concerns; gut health and GI-MAP; chronic symptoms that standard labs miss.
How Christina thinks: symptoms are signals, labs are clues, and the whole person matters.
Dr. Eric Landi, KICP, DCCo-Founder. Longevity and Functional Medicine.Dr. Landi brings over a decade of clinical experience and a data-driven approach to functional medicine, peptide therapy, metabolic health, and longevity care. He helped bring a formal functional medicine framework into HFW in 2020 and continues to guide the testing-first, optimization-focused model that defines the practice.
Focus: advanced functional testing strategy, peptide sequencing, bioregulator support, metabolic optimization, mitochondrial and cellular health, gut-brain-longevity connections, and long-term biomarker tracking.
How Dr. Landi thinks: the better the data, the more precise the strategy.
Dr. Saul Maslavi, MDMedical Director. Board-Certified Family Medicine Physician.Dr. Maslavi is a board-certified family medicine physician with more than 20 years of clinical experience. His role at HFW is physician-level oversight, safety review, complex-case guidance, and clinical policy across hormone optimization, metabolic health, inflammation-related conditions, biological age tracking, and advanced therapeutic protocols. His role is primarily medical direction rather than routine patient visits.
How Dr. Maslavi thinks: normal labs reflect population averages. They do not always reflect optimal health.
Anthony brings more than two decades of experience as a trainer. He helps you build consistent habits around nutrition, exercise, sleep, and other clinician-approved priorities, with regular check-ins so progress does not depend on motivation alone. He does not diagnose, interpret testing, prescribe, select therapies, change doses, or manage side effects. Clinical questions go back to your advanced care clinician.
Scott M. Davis, CPACo-Founder and Chief Operating Officer. Nonclinical.Scott is a Certified Public Accountant with more than a decade of experience advising business owners and closely held companies, and is certified in clinical peptide therapy through Peptide University. At HFW he turns the clinical vision into a practice that works for patients: technology, patient experience, laboratory relationships, product sourcing standards, pricing transparency, and operational standards.
His role is entirely nonclinical. He does not diagnose, provide medical advice, or make treatment decisions.
How Scott thinks: a practice's incentives eventually show up in the patient experience. Build the business so that doing right by the patient is also the most sustainable path.
Patient Success handles onboarding, testing logistics, scheduling, communication, and navigation, and can explain program structure and current written pricing. Patient Success does not interpret results, diagnose, recommend a therapy, promise eligibility, change a dose, or advise on side effects. Those questions are routed to a clinician.
Clinician-led care. Functional medicine strategy. Long-term optimization.
Christina Warner, APN-C
Board-Certified Women’s Health Nurse Practitioner
Christina Warner brings 25 years of clinical experience and a deeply personal understanding of what it means to be dismissed by a system that does not always see the whole person.
Her work is shaped by her own experience with life-threatening postpartum heart failure and later uncovering Bartonella as a hidden driver behind neurocognitive symptoms affecting mood, memory, focus, and daily function.
Those experiences shaped her belief that the body cannot be treated in pieces.
Christina Warner, APN-C
How Christina Thinks
HFW Longevity has completed Clinical Peptide Therapy Certification coursework through Peptide University as part of its commitment to safe, informed, clinician-guided peptide protocols.
You are not handed off. You are supported.
| Team Member | Role in Your Care |
|---|---|
|
Christina Warner, APN-C |
Leads patient-centered hormone, women’s health, gut, chronic condition, and root-cause care with a deep focus on listening and clinical pattern recognition.
|
|
Dr. Eric Landi, KICP, DC |
Designs and oversees functional testing strategy, peptide therapy applications, metabolic optimization, gut-health protocols, and data-driven longevity planning.
|
|
Dr. Saul Maslavi, MD |
Provides medical director oversight, physician-level clinical support, safety review, hormone and metabolic guidance, and longevity-focused medical direction.
|
 Scott M. Davis, CPA |
Leads the business and operational side of the practice — vendor and lab partnerships, sourcing standards for supplements and compounds, pricing transparency, and the infrastructure that supports your care. Non-clinical; does not participate in treatment decisions. |
Not a rushed visit. A long-term clinical relationship.
Correction comes before optimization.
At HFW, we evaluate health through nine interconnected categories:
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HFW evaluates health through nine interconnected foundations, then corrects what is meaningful before optimizing anything on top.
24 pages on advanced testing, clinician-led protocols, and why strategy comes before any single compound.
Trusted by 1000+ patients across USA
Stella Blanch Apo
It’s been a blessing working with Dr. Landi and his entire team! After getting my test results, Dr. Landi walked me through a number of helpful steps to restore my health. He is very knowledgeable and uses an in-depth functional medicine approach in addressing health concerns. Bernadette is also very kind and thoughtful and I enjoy the interpersonal connection I have built with all of them.
Chase Natale
Fatimah Fahmy
Lauren Griffith
Kevin Heckman
We are here to complete the picture.
Conventional medicine is essential for emergencies, acute care, major disease, and life-saving intervention.
But problem was that no one had looked deeply enough.
But many patients do not come to us because they have never seen a doctor.
A team that listens, tests, tracks, and adjusts.
| Conventional Weight Loss Care | HFW Longevity | |
|---|---|---|
Visit style |
Short appointments, one complaint at a time |
Comprehensive conversations about your full health story |
Lab philosophy |
Standard panels and population ranges |
Advanced testing, trends, symptoms, and functional patterns |
What you hear |
“Everything looks normal.” |
Let’s break this down and find out what your body is showing us. |
Approach |
Manage symptoms or wait for diagnosis |
Identify dysfunction early, correct the foundation, then optimize |
Testing |
Basic bloodwork |
GI-MAP, DUTCH, Metabolomix+, TruAge, food sensitivity, cortisol, custom bloodwork, and more when appropriate |
Treatment |
Generic medication or referral |
Personalized protocols, hormone support, supplements, peptides, bioregulators, nutrition, and lifestyle strategy |
Follow-up |
“Come back in six months.” |
Quarterly labs, regular reviews, symptom tracking, and protocol adjustments |
Goal |
Keep you out of disease range |
Improve how you feel, function, recover, perform, and age |
We review your symptoms, health history, goals, and concerns to determine the best next steps.
Advanced testing helps uncover the underlying factors affecting your health and identify where to focus first.
Your provider translates your results into a personalized roadmap with clear priorities and recommendations.
Your care plan focuses on addressing the underlying imbalances identified through your evaluation.
Your personalized plan may include nutrition, lifestyle strategies, supplements, medications, or advanced therapies when clinically appropriate, with ongoing monitoring.
Regular follow-ups, progress tracking, and plan adjustments help you sustain results and support long-term health.
A long-term clinical relationship, not a rushed visit.
A free telehealth call with an advanced care clinician to decide whether HFW is the right fit and what to test first.
Testing is selected because the result would change a decision. Your clinician interprets it alongside your history and goals and builds a prioritized plan. See the testing →
Gut, inflammation, nutrients, sleep, immune balance, hormones, and metabolic health are addressed first or alongside anything more advanced.
Your plan may include nutrition, lifestyle strategy, supplements, medications, or advanced therapies when clinically appropriate. Members retest with TruHealth each quarter with a scheduled clinician review, and the plan follows the results. See membership →
Not just appointments. A relationship with a team that tracks your biology over time.
HFW is not a replacement for emergency care, primary care, or specialist care. Care is 100% telehealth; HFW is self-pay and does not bill insurance.
Most people do not fail because the plan was wrong. They fail because no one tracked it. Membership is for people ready to make a commitment to healthy aging, or to longer-term corrective care and health optimization: the testing, the clinician, and the coaching around your plan all year, retesting each quarter and adjusting as the results change. Not every plan has to be a membership; testing and focused care visits stand on their own.
Begins after a separate $450 initial TruHealth assessment, which includes a 60 to 90 minute clinician review. Bloodwork, medications, and treatments are purchased separately.
Book a Free Consultation| Traditional Office Visit | HFW Telehealth Model |
|---|---|
|
❗Drive, park, wait, repeat |
✅ Meet virtually from home |
|
❗One short visit |
✅ Structured consults and ongoing reviews |
|
❗Basic labs only |
✅ Advanced diagnostics shipped or coordinated |
|
❗Local access limits |
✅ Patients seen nationwide |
|
❗Reactive care |
✅ Proactive optimization |
|
❗“See you in six months” |
✅ Quarterly tracking and adjustments |
We do not do generic wellness. We build clinical strategies around your biology for longevity.
Real progress. Real support. No shame.
Stella Blanch Apo
It’s been a blessing working with Dr. Landi and his entire team! After getting my test results, Dr. Landi walked me through a number of helpful steps to restore my health. He is very knowledgeable and uses an in-depth functional medicine approach in addressing health concerns. Bernadette is also very kind and thoughtful and I enjoy the interpersonal connection I have built with all of them.
Chase Natale
Fatimah Fahmy
I have been working with Dr Landi for several months now. He is extremely knowledgeable, attentive and responsive. He actually listens which is rare in medicine these days. I’m excited to see what the results are from my protocol in a couple of months. Highly recommend his practice if you’re looking into functional medicine.
Lauren Griffith
Dr. Landi is highly knowledgeable and skilled in the field of functional medicine, but he also possesses a genuine empathy and compassion that is so often lacking in the traditional healthcare system. Dr. Landi connects to each of his patients on a personal level, works with you every step of the way, and makes you feel supported while navigating challenging health obstacles.
Kevin Heckman
I found out about the practice of Functional Dr’e last year and realized this is what I need! Finding Dr Landi so close to home was awesome. We appreciated his candor, knowledge and engaging personality. He exuded caring and interest in me and my situation. I feel he had repeatedly gone the extra mile for me so our collaboration is successful.
Not just appointments. A relationship with a team that tracks your biology over time.
It's been a blessing working with Dr. Landi and his entire team. After getting my test results, Dr. Landi walked me through a number of helpful steps to restore my health.
Stella Blanch ApoHe actually listens which is rare in medicine these days. I'm excited to see what the results are from my protocol in a couple of months. Highly recommend his practice if you're looking into functional medicine.
Fatimah FahmyDr. Landi connects to each of his patients on a personal level, works with you every step of the way, and makes you feel supported while navigating challenging health obstacles.
Lauren GriffithBook a free telehealth consultation to talk through your symptoms, what has already been tried, and whether we are the right team to help.
Book a Free ConsultationBased in Hillsdale, New Jersey. Care by telehealth.
Short answers to what people ask before booking.
HFW is clinician-led with physician medical direction. Dr. Saul Maslavi, MD is HFW’s Medical Director, a board-certified family medicine physician with more than 20 years of experience, providing medical direction, complex-case oversight, and clinical policy. Christina Warner, APN-C is an advanced care clinician and board-certified women’s health nurse practitioner with more than 20 years of experience, who conducts evaluations, reviews testing, develops and adjusts plans, and evaluates prescription eligibility within her licensed scope. Eric Landi, DC is co-founder and Functional Medicine Clinical Lead. Prescription decisions are evaluated and issued by an appropriately authorized HFW prescriber.
Advanced care clinician is HFW’s term for a qualified patient-facing clinical professional who evaluates patients, reviews testing, builds and adjusts care plans, and works within their licensed scope. It is not a way of blurring credentials. Each clinician’s actual license and role is listed on this page, and prescribing is done only by an appropriately authorized HFW prescriber.
Dr. Saul Maslavi, MD is HFW’s Medical Director and a physician with more than 20 years of experience. His role is primarily medical direction rather than routine patient visits. He oversees complex cases, supports clinical escalation and policy, and helps keep HFW’s longevity and optimization model connected to conventional medical safety.
No, and that distinction matters. HFW has a physician medical director, an advanced practice clinician who prescribes within her scope, a functional medicine clinical lead, a nonclinical accountability and habit coach, and a nonclinical Patient Success Coordinator. Each person’s role and scope is stated openly on this page so you know who is making which decision about your care.
Anthony Reyes is HFW’s Accountability and Habit Coach with more than two decades of experience as a trainer. He helps you build consistent habits around nutrition, exercise, sleep, and other clinician-approved priorities. He does not diagnose, interpret testing, prescribe, select therapies, change doses, or manage side effects. Clinical questions go back to your advanced care clinician.
Patient Success handles the nonclinical side of your experience: onboarding, testing logistics, scheduling, communication, navigation, and making sure nothing falls through the cracks. Patient Success can explain program structure, current written pricing, and what happens next. Patient Success does not interpret results, diagnose, recommend a therapy, promise eligibility, change a dose, or advise on side effects. Those questions are routed to a clinician.
Clinical questions, including symptoms, side effects, dose questions, and result interpretation, go to your advanced care clinician through HFW’s secure patient workflow. Scheduling, testing kits, shipping, billing, and general logistics go to Patient Success. Severe, rapidly worsening, or potentially life-threatening symptoms are a medical emergency and require emergency care, not a message.
HFW was created to serve the space between reactive sick care and product-first optimization. The founders saw that traditional care, while essential, often lacks the time and structure to help healthy people act proactively or to help patients whose symptoms do not fit a clear disease label. They also saw an optimization market that frequently sold peptides or medications before doing the work to determine whether those tools were appropriate for the individual. HFW was built around a different idea: know the patient, test when it can change a decision, identify real priorities, and use the least intervention reasonably necessary.
Have more questions? Ask Healie →
