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    • – Undermethylation
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Dr Dave’s Blog
  • 03
    Jul
    Walsh Protocol Review | Benefits, Limits & Nonresponders No Comments on Walsh Protocol Review | Benefits, Limits & Nonresponders
  • 01
    Jul
    Folate Receptor Antibodies, Methylation & Neurodevelopment | FRAT, FRAA, Leucovorin No Comments on Folate Receptor Antibodies, Methylation & Neurodevelopment | FRAT, FRAA, Leucovorin
  • 01
    Jul
    Oxidative Stress in Autism & Neurodevelopment | 8-OHdG, Glutathione, SOD No Comments on Oxidative Stress in Autism & Neurodevelopment | 8-OHdG, Glutathione, SOD
Five Biotypes of Depression
  • Pyrrole Disorder
  • Copper Overload
  • Toxic Overload
  • Overmethylation
  • Undermethylation
Copyright 2026 © Second Opinion Physician, P.C.
  • ×
  • Consultations
    • Doctor Consultations
    • Free Walsh Protocol Pre-Consultation
    • 15-Minute Phone Consultation with Dr. Epstein
    • WalshDoc Biotype Questionnaire-Only Assessment
    • WalshDoc Biotype + Methylation Questionnaire-Only Assessment
    • Walsh Protocol Biotype Assessment (Initial Consultation)
    • Walsh Protocol Biotype + Methylation Panel — Initial Consultation
    • Follow-Up Assessment — Biotype Labs Review with Report
    • Follow-Up Methylation Panel Review with Report
    • Follow-Up Consultation – Updated Assessment | Biotype Labs + Methylation Panel
    • Functional Medicine Consultation — Comprehensive Assessment with Report
    • Folate Receptor Antibody Test (FRAT Test) with Online Physician Consultation
  • Labs
    • All Biotype Panels
      • Comprehensive Biotype Panel
      • Methylation Panel – Genova
      • Methylation Panel – Doctors Data
      • Copper Overload Biotype Panel
      • Panel 1: Core Nutrient & Inflammation Follow-Up
      • Panel 2: Allergy & Immune Reactivity
      • Panel 3: Oxidative Stress Screen
      • Panel 4: Mitochondrial / Gut-Metabolic Panel
      • Panel 5: Toxic Metals & Antioxidant Reserve
    • Biotype Single Tests
      • Histamine, Whole Blood
      • Homocysteine
      • Zinc Deficiency Test, Plasma
      • Copper
      • Ceruloplasmin
      • Pyrroles, Urine
      • Vitamin D
      • CBC
      • Metabolic Panel
      • Hair and Toxic Elements
    • Other Popular Lab Panels
      • Hashimoto’s Thyroid
      • Stool Analysis CPP
      • Stool Analysis CDSA
      • Inflammation Panel
      • Alzheimer’s Cognoscopy
      • Female Sex Hormones
      • Male Hormone Panel
      • TBI Hormone PTSD
      • Female, Adrenal & Thyroid
      • Optimal Brain Nutrients
      • Leaky Gut Panel
    • Popular Single Item Tests
      • FRAT – Folate Receptor Antibody Test
      • MTHFR, C677T, A1298C Genetic
      • Fragile X Syndrome Test
      • APOE Genetic Test
      • Interleukin 6, IL6 Serum Test
      • HS-CRP (C-Reactive Protein)
      • Glutathione Blood Test
      • Magnesium RBC Test
      • Cystatin-C
  • Supplements
    • Links to BiotypeNutrients
      • Undermethylation
      • Overmethylation
      • Pyroluria
      • Copper Overload
      • Toxic Overload
      • Intestinal Health
      • Homocysteine
      • Kidney Detoxification
      • Liver Detoxification
      • Ceruloplasmin
  • The Walsh Approach
    • Walsh Protocol Review | Benefits, Limits & Nonresponders
    • Five Biotypes of Depression
    • – Undermethylation
    • – Pyroluria
    • What is WalshDoc?
    • Walsh Research and Publications
    • Walsh Research Institute – William Walsh, PhD
    • Walsh Video Interviews & Lectures
  • General Info
    • My Account (Login/Orders)
    • About Us
    • Contact Us
    • FAQs
    • Newsletter
    • Payment Information
    • Schedule An Appointment
    • Reschedule My Appointment
  • Blog
  • Patient Questionnaires
    • Patient Questionnaires
    • What is WalshDoc?
    • WalshDoc Labs and Report Workflow
    • WalshDoc Biotype Questionnaire
    • WalshDoc Biotype + Toxic Burden Questionnaire
    • WalshDoc Biotype + Toxic Burden Follow-Up Questionnaire
    • WalshDoc Pediatric Neurodevelopment Questionnaire
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