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FirstCall - Essential Nutrients Panel

Explore nutrient profiles to identify deficiencies in vitamins and minerals that may be impacting your energy, immunity, and overall health.

What we test

  • Vitamin D, 25-OH, Total
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
  • Vitamin B12 (Cobalamin)
  • Folate (RBC)
  • Vitamin B6
  • Magnesium (RBC)
  • Zinc
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)

FAQ

Answers to common questions about panels, results, and your plan.

Photo of Dr. Erik Petersen

Dr. Erik Petersen

Erik Petersen, DO, is a board-certified Internal Medicine physician, Med-Peds trained physician, and co-founder of FirstCall DPC. With more than 20 years of experience in Emergency Medicine and comprehensive patient care, Dr. Petersen brings a practical, evidence-based approach to primary care, preventive medicine, and health optimization. At FirstCall DPC, he focuses on building long-term physician-patient relationships while addressing acute concerns, chronic disease management, metabolic health, hormone optimization, ADHD care, nutrition, and overall wellness. His approach emphasizes identifying underlying risk factors, using objective data and laboratory testing when appropriate, and creating individualized treatment plans that patients can realistically implement. Dr. Petersen believes effective healthcare should be accessible, proactive, and centered on helping patients improve both their current health and long-term quality of life.

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Focus areas

  • Men's Health

  • Mental Health

  • Metabolic Health

  • Athletic Performance & Recovery

States of practice

  • Alabama

  • Arizona

  • California

  • Colorado

  • Florida

  • Georgia

  • Hawaii

  • Idaho

  • Indiana

  • Iowa

  • Louisiana

  • Maine

  • Michigan

  • Missouri

  • Nebraska

  • North Carolina

  • Pennsylvania

  • South Carolina

  • Tennessee

  • Texas

  • Utah

  • Wisconsin