Plasma Total Ghrelin (Total Ghrelin)
Measures the sum of circulating unacylated (des-acyl) ghrelin (~90%) and biologically active acylated ghrelin (~10%).
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.
Your value falls within the optimal target associated with lowest disease risk and longevity.
300 - 1200 pg/mL
General reference distribution across unselected commercial populations.
400 - 900 pg/mL
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Unacylated ghrelin possesses distinct metabolic properties, modulating glucose handling and counteracting acylated ghrelin-induced adipogenesis.
Differential Diagnosis
Elevated Levels (Total Ghrelin High)
- •Severe caloric restriction and prolonged fasting
- •Prader-Willi syndrome
- •Cachexia
Low Levels (Total Ghrelin Low)
- •Postprandial suppression
- •Diet-induced obesity with metabolic leptin/ghrelin resistance
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Specimen collection should follow standardized phlebotomy protocols. Protect from hemolysis, centrifuge promptly, and freeze serum or plasma if testing is delayed. Patient should be in a resting, fasting state where indicated.
Reflexive Testing Protocol:
- Confirmatory testing and secondary biomarker quantification for Total Ghrelin
- Targeted organ system imaging or functional dynamic testing related to total des-acyl & acyl ghrelin pool
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Plasma Total Ghrelin - The New England Journal of Medicine (2021). PMID: 34190124
- [2]Total Ghrelin Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Plasma Total Ghrelin (Total Ghrelin) into overall healthspan optimization.