Serum Palmitic Acid (Palmitic Acid)
16-carbon saturated fatty acid (16:0), the primary end product of hepatic de novo lipogenesis (FASN) from dietary carbohydrates.
Standard vs. Optimal Reference Ranges%
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.
18.0 - 26.0% total fatty acids
General reference distribution across unselected commercial populations.
<22.0% (minimal lipotoxicity)
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Excess free palmitate directly activates Toll-like receptor 4 (TLR4) on macrophages and induces endoplasmic reticulum stress and ceramide synthesis.
Differential Diagnosis
Elevated Levels (Palmitic Acid High)
- •Excessive dietary fructose / refined carbohydrate intake (high de novo lipogenesis)
- •High saturated fat intake
- •MASLD / hepatic steatosis
Low Levels (Palmitic Acid Low)
- •Optimal metabolic insulin sensitivity and low de novo lipogenesis (<22%)
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 Palmitic Acid
- Targeted organ system imaging or functional dynamic testing related to saturated lipotoxicity & tlr4 activation
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Serum Palmitic Acid - The New England Journal of Medicine (2021). PMID: 34090124
- [2]Palmitic Acid Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35322901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Serum Palmitic Acid (Palmitic Acid) into overall healthspan optimization.