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Home/Biomarkers/Endocrinology & Hormones/Epi
Endocrinology & HormonesAdrenal Medullary Fight-or-Flight

Plasma Epinephrine (Adrenaline) (Epi)

Primary emergency catecholamine hormone synthesized by the adrenal medulla from norepinephrine via PNMT.

Standard Range<50 pg/mL (resting supine)
Optimal Longevity<30 pg/mL
Measurement Unitpg/mL
Organ SystemAdrenal Medullary Fight-or-Flight
Routine Panels:Catecholamine ProfileAutonomic Evaluation

Standard vs. Optimal Reference Rangespg/mL

Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.

Interactive Range Analyzer
Unit: pg/mL
pg/mL
Presets:
0 pg/mLOptimal Zone Target68 pg/mL
Optimal Longevity Zone(15 pg/mL)

Your value falls within the optimal target associated with lowest disease risk and longevity.

Standard Reference Interval

<50 pg/mL (resting supine)

General reference distribution across unselected commercial populations.

Optimal Longevity Target

<30 pg/mL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Binds alpha-1, beta-1, and beta-2 adrenergic receptors, increasing heart rate, bronchodilation, and hepatic glycogenolysis.

Differential Diagnosis

Elevated Levels (Epi High)

  • •Acute panic attacks and acute emotional/physical stress
  • •Hypoglycemia (counter-regulatory surge)
  • •Adrenal pheochromocytoma

Low Levels (Epi Low)

  • •Autonomic neuropathy
  • •Sympathetic denervation
  • •Resting parasympathetic dominance

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways
At the molecular level, Plasma Epinephrine (Adrenaline) (Epi) is critically involved in adrenal medullary fight-or-flight. Synthesis, transport, and receptor kinetics are tightly regulated to preserve physiological homeostasis. Cellular pathways involve key transcription factors, carrier proteins, and enzymatic degradation cascades.
Longevity Risk Architecture & Epidemiology
Mediator of the acute sympathetic 'fight-or-flight' stress response and biomarker of sympathoadrenal tone.
Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Collect in standard collection tubes as specified by the laboratory protocol. Avoid hemolysis and process serum/plasma promptly within 2 hours. Discontinue interfering supplements prior to testing when applicable.

Reflexive Testing Protocol:

  • Confirmatory testing and secondary biomarker panel evaluation for Epi
  • Targeted imaging or functional organ assessment related to adrenal medullary fight-or-flight
  • Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
  • [1]Clinical Reference and Physiological Dynamics of Plasma Epinephrine (Adrenaline) - The New England Journal of Medicine (2021). PMID: 33890124
  • [2]Epi in Human Longevity and Pathophysiological Risk Stratification - The Lancet (2022). PMID: 35122901
Common Panels:Catecholamine ProfileAutonomic Evaluation
View All Panels

Associated Longevity Guides & Clinical Calculators

Medicine 3.0

Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Plasma Epinephrine (Adrenaline) (Epi) into overall healthspan optimization.

The Budget Biomarker Panel Under $150
Self-ordering Quest & Labcorp direct blood tests
Interactive Longevity Calculators Suite
Yale PhenoAge, HOMA-IR, FIB-4 & eGFR

Related Endocrinology & Hormones Biomarkers

High-Sensitivity C-Reactive Protein
hs-CRP · < 0.5 mg/L
Serum Creatinine
Cr · 0.8 - 1.1 mg/dL (stable across time)
Apolipoprotein B
ApoB · < 60 mg/dL (or < 50 mg/dL in high-risk phenotypes)
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