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  • Consultations
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    • Free Walsh Protocol Pre-Consultation
    • 15-Minute Phone Consultation with Dr. Epstein
    • Walsh Protocol Biotype Assessment (Initial Consultation)
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    • Follow-Up Assessment — Biotype Labs Review with Report
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    • Follow-Up Consultation – Updated Assessment | Biotype Labs + Methylation Panel
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    • Folate Receptor Antibody Test (FRAT Test) with Online Physician Consultation
  • Conditions
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    • Choosing the Best Antidepressant
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    • All Biotype Panels
      • Comprehensive Biotype Panel
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      • 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
      • Apolipoprotein B (Lipids)
      • Cholesterol w basic lipids
      • Comprehensive Stool Analysis (CPP)
      • Cortisol – Salivary
      • Leaky Gut / Celiac Lab Tests
      • Female Hormone Panel
      • Folate RBC
      • Folate Receptor Antibody (FRAT Test)
      • Glucose, Lipids and Inflammation
      • Hashimoto’s Thyroid Panel
      • HS-CRP (C-Reactive Protein)
      • Lipids, HbA1C
      • Magnesium RBC Test
      • MTHFR plus C677T and A1298C
      • MycoTOX Profile: Comprehensive Mold
      • Testosterone, Free/Total
    • Common Lab Findings
      • Zinc Deficiency
      • Copper Overload
      • Low Ceruloplasmin & Free Copper
      • High Histamine
      • Elevated Homocysteine
      • High Urine Pyrroles
      • Elevated SAH & Low SAM
      • High Basophils
      • View All Lab Findings
  • The Walsh Approach
    • Second Opinion Articles Hub
    • The Walsh Approach
    • Undermethylation and Elevated SAH
    • Walsh Protocol Nonresponders
    • Five Biotypes of Depression
    • – Undermethylation
    • – Overmethylation
    • – Copper Overload
    • – Pyroluria
    • – Toxic Overload
    • What is WalshDoc?
    • What Causes Undermethylation?
    • Why Folic Acid Can Worsen Depression
    • Walsh Research and Publications
    • Walsh Research Institute – William Walsh, PhD
    • Walsh Video Interviews & Lectures
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    • FAQs
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    • Supplements (biotypenutrients.com):
      • Undermethylation
      • Overmethylation
      • Pyroluria
      • Copper Overload
      • Toxic Overload
      • Intestinal Health
      • Homocysteine
      • Kidney Detoxification
      • Liver Detoxification
      • Ceruloplasmin
  • 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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FAQ's

Frequently Ask Questions and Resources links

Blogroll

  • Bio-Balance Articles
  • Copper Elimination
  • How to Treat Histamine Intolerance and High Histamine Levels
  • Hypercupremia – High Copper
  • Micronutrient Therapy for Violent and Aggressive Mail Youth – William Walsh PhD, et. al
  • Nutrition Data

Dr William Walsh, PhD Publications

  • "Nutrient Power" Book
  • Micronutrient Therapy for Violent and Aggressive Mail Youth – William Walsh PhD, et. al

Copper Overload

  • Copper Elimination
  • Copper Toxicity Syndrome
  • Hypercupremia – High Copper

Homocysteine

  • Homocysteine and Neurological Disease
  • Methylation and Homocysteine

Metallothionein

  • Metalolothioneine; An Overview on its Metal Homeostatic Regulation in Mammals

Methylation

  • Methylation and Homocysteine

Mood and Behavior

  • Copper Elimination
  • Hypercupremia – High Copper
  • Methylation and Homocysteine
  • Micronutrient Therapy for Violent and Aggressive Mail Youth – William Walsh PhD, et. al

Nutrition

  • Nutrition Data

Resource Links

  • "Nutrient Power" Book
  • Copper Elimination
  • Copper Toxicity Syndrome
  • Homocysteine and Neurological Disease
  • How to Treat Histamine Intolerance and High Histamine Levels
  • Metalolothioneine; An Overview on its Metal Homeostatic Regulation in Mammals
  • Methylation and Homocysteine
  • Micronutrient Therapy for Violent and Aggressive Mail Youth – William Walsh PhD, et. al
  • Nutrition for Mental Health
  • Safe Harbor Articles
  • Walsh Certified Physicians List
  • Walsh Website Resources
My Shopping Cart
Key Tests and Consultation Items
  • – Medical Consultations
  • – Walsh Test Panels
  • – Walsh Single Tests
  • – Other Lab Panels
  • – Other Single Item Tests
Dr Dave’s Blog
  • 19
    Jul
    Healthy Diet for OCD & Depression No Comments on Healthy Diet for OCD & Depression
  • 19
    Jul
    Histamine Intolerance vs High Histamine 41 Comments on Histamine Intolerance vs High Histamine
  • 19
    Jul
    Zinc Deficiency No Comments on Zinc Deficiency
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
    • 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
  • Conditions
    • ADHD
    • Anxiety
    • Autism
    • Bipolar Disorder
    • Dementia
    • Depression
    • Dysautonomia
    • Histamine Disorder
    • Inflammation
    • Insomnia
    • Mitochondrial Dysfunction
    • Oxidative Stress
    • OCD – Obsessive Compulsive Disorder
    • Schizophrenia
  • Medications
    • Choosing the Best Antidepressant
    • SSRIs Explained
    • SNRIs Explained
    • ADHD Medications
    • Mood Stabilizers
    • Antipsychotics Medications
  • 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
      • Apolipoprotein B (Lipids)
      • Cholesterol w basic lipids
      • Comprehensive Stool Analysis (CPP)
      • Cortisol – Salivary
      • Leaky Gut / Celiac Lab Tests
      • Female Hormone Panel
      • Folate RBC
      • Folate Receptor Antibody (FRAT Test)
      • Glucose, Lipids and Inflammation
      • Hashimoto’s Thyroid Panel
      • HS-CRP (C-Reactive Protein)
      • Lipids, HbA1C
      • Magnesium RBC Test
      • MTHFR plus C677T and A1298C
      • MycoTOX Profile: Comprehensive Mold
      • Testosterone, Free/Total
    • Common Lab Findings
      • Zinc Deficiency
      • Copper Overload
      • Low Ceruloplasmin & Free Copper
      • High Histamine
      • Elevated Homocysteine
      • High Urine Pyrroles
      • Elevated SAH & Low SAM
      • High Basophils
      • View All Lab Findings
  • The Walsh Approach
    • Second Opinion Articles Hub
    • The Walsh Approach
    • Undermethylation and Elevated SAH
    • Walsh Protocol Nonresponders
    • Five Biotypes of Depression
    • – Undermethylation
    • – Overmethylation
    • – Copper Overload
    • – Pyroluria
    • – Toxic Overload
    • What is WalshDoc?
    • What Causes Undermethylation?
    • Why Folic Acid Can Worsen Depression
    • Walsh Research and Publications
    • Walsh Research Institute – William Walsh, PhD
    • Walsh Video Interviews & Lectures
  • General Info
    • Blog
    • About Us
    • Contact Us
    • My Account (Login/Orders)
    • FAQs
    • Payment Information
    • Schedule An Appointment
    • Reschedule My Appointment
    • Supplements (biotypenutrients.com):
      • Undermethylation
      • Overmethylation
      • Pyroluria
      • Copper Overload
      • Toxic Overload
      • Intestinal Health
      • Homocysteine
      • Kidney Detoxification
      • Liver Detoxification
      • Ceruloplasmin
  • 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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