Walsh Approach Telemedicine, Biotype Assessment and Functional Medicine Strategy
Second Opinion Physician is a telemedicine practice founded by David Epstein, D.O., focused on the Walsh Approach, lab-guided nutrient therapy, methylation analysis, toxic burden assessment, and functional medicine strategies for mood, behavior, neurodevelopmental, and cognitive concerns.
The practice helps patients organize symptoms, history, prior treatment response, and laboratory findings into a practical clinical strategy. The goal is not a one-size-fits-all supplement list, but a clearer understanding of which biochemical and functional barriers may be driving symptoms or limiting response.
Clinical experience in osteopathic, nutritional and functional medicine.
Direct training in the Walsh Approach to mood and behavior disorders.
Biotype, methylation, copper-zinc, pyrrole and oxidative stress review.
Online access to assessment, reports, consultation and follow-up strategy.
David Epstein, D.O.
Dr. David Epstein is an osteopathic physician with more than 35 years of clinical experience and a long-standing interest in natural, nutritional, oxidative, and functional approaches to chronic health problems.
Before developing Second Opinion Physician as a telemedicine practice, Dr. Epstein founded and operated a medical clinic in Atlanta that emphasized EDTA chelation, IV vitamins, oxidative therapies, heavy-metal burden, antioxidant support, and functional medicine.
His interest in biochemical psychiatry deepened after training directly with Dr. William J. Walsh and learning the Walsh Approach to mood and behavior disorders.
From symptoms to strategy
The Walsh model gave Dr. Epstein a more structured way to connect symptoms, traits, nutrient imbalances, methylation patterns, copper-zinc regulation, oxidative stress, and lab-confirmed treatment priorities.
Second Opinion Physician now uses that foundation alongside functional medicine review of diet, gut absorption, inflammatory burden, toxic exposure, hormones, compliance and follow-up trends.
Walsh Approach + Functional Medicine Review
The Walsh Approach, pioneered by William J. Walsh, Ph.D. and the Walsh Research Institute, organizes many mood and behavior disorders around recurring biochemical patterns. Second Opinion Physician uses this framework as a starting point, then expands the review to include the functional barriers that may affect outcome.
The “5 + 1” Perspective
The Walsh model provides five core biochemical pattern categories. Second Opinion Physician adds a practical “+1” review for toxic burden, oxidative stress, methylation bottlenecks, gut-liver-kidney clearance, cellular resilience and other barriers that can limit response.
Five Walsh Pattern Categories
Core biochemical patterns used to organize symptoms, traits, labs and nutrient priorities.
The “+1” Functional Review
This added layer asks why a clear biotype may still need a different order of support.
Video Interview with Dr. Walsh
Dr. Epstein’s video discussion with Dr. William Walsh on methylation and related treatment strategy is an important credibility piece for this page. It connects the foundation of the Walsh Approach with Dr. Epstein’s current focus on SAH, creatine demand, alkalinity, kidney pH, and methylation bottlenecks.
Questionnaires, Reports and Follow-Up Tracking
WalshDoc is the structured questionnaire and assessment system developed by Second Opinion Physician to make complex patient history easier to organize. It helps convert symptoms, traits, labs, and follow-up changes into readable pattern-based reports.
Questionnaire
Patients complete a focused symptom and history intake.
Pattern review
WalshDoc organizes answers into biotype, toxic burden, pediatric, insomnia or functional health domains.
Testing priorities
The report helps identify which labs may clarify the pattern.
Physician report
Dr. Epstein can add clinical impressions, supplement strategy and follow-up priorities.
Follow-up
Symptoms, labs and supplements can be tracked over time.
Assessment, Testing and Practical Priorities
Second Opinion Physician is designed for patients who need more than a generic supplement list. The goal is to organize symptoms, testing, treatment response and follow-up strategy into a clearer clinical path.
Online access to biotype, methylation, copper-zinc, pyrrole and oxidative stress testing pathways.
Symptoms, history, labs, prior treatment response and functional barriers are reviewed together.
Helpful for patients who have not responded well to medication-only or one-size-fits-all approaches.
Diet, digestion, toxicity, inflammation, hormones, oxidative stress and nutrient tolerance are considered.
Key nutrients are separated from secondary supports so patients understand what matters most.
Retesting, symptom tracking, maintenance nutrients and response trends can guide next steps.
Mood, Behavior, Neurodevelopment and Cellular Stress
The practice commonly reviews mood, behavior, cognitive, neurodevelopmental, metabolic, inflammatory and functional health concerns where nutrient biochemistry, methylation or oxidative stress may be relevant.
Mood and behavior
Neurodevelopment
Biotype patterns
Functional barriers
Not Sure Which Path Fits?
Patients who are unsure whether to begin with a Walsh biotype questionnaire, methylation testing, toxic burden review, pediatric assessment, cellular stress panel, or consultation can begin with the free pre-consultation or a symptom-based questionnaire.