Fasting Plasma Lactic Acid (Lactate) (Lactate)
Plasma lactic acid measures the final product of anaerobic glycolysis. In resting, fasting conditions, baseline elevations reflect impaired mitochondrial oxidative phosphorylation or subclinical tissue hypoperfusion.
Standard vs. Optimal Reference Rangesmmol/L
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.
0.5 - 2.0 mmol/L
General reference distribution across unselected commercial populations.
0.5 - 1.2 mmol/L (Resting Fasting)
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Under hypoxia or mitochondrial dysfunction, pyruvate is reduced to L-lactate by lactate dehydrogenase (LDH), regenerating NAD+ to maintain glycolytic flux. Elevated resting lactate reflects shifting toward aerobic glycolysis (Warburg effect).
Differential Diagnosis
Elevated Levels (Lactate High)
- •Tissue hypoperfusion / Sepsis
- •Metformin-associated lactic acidosis
- •Mitochondrial myopathies / Genetic respiratory chain defects
- •Strenuous recent muscular exertion
Low Levels (Lactate Low)
- •Normal efficient aerobic mitochondrial respiration
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Strict 10 to 12 hour overnight water-only fasting is mandatory for baseline metabolic quantification. Acute psychological stress, acute infectious illness, and sleep deprivation (<6 hours) transiently elevate cortisol and catecholamines, falsely elevating glycemic markers. For glucose and insulin testing, draw blood into sodium fluoride/potassium oxalate tubes or separate serum promptly within 30 minutes to prevent ongoing in vitro red blood cell glycolysis.
Reflexive Testing Protocol:
- Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) and HOMA-Beta calculations
- Continuous Glucose Monitoring (CGM) 14-day wear to evaluate glycemic variability and postprandial excursions
- Fasting C-Peptide and high-sensitivity Troponin/hs-CRP to differentiate insulin resistance from beta-cell exhaustion
- Oral Glucose Tolerance Test (OGTT) with simultaneous 0, 30, 60, and 120-minute insulin assays
- Abdominal ultrasound or FibroScan to evaluate hepatic steatosis and non-alcoholic fatty liver disease (MASLD)
Clinical Citations & Primary Literature (1)
- [1]Lactate in Metabolic Regulation and Cellular Bioenergetics - Cell Metabolism (2022). PMID: 35026117
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Fasting Plasma Lactic Acid (Lactate) (Lactate) into overall healthspan optimization.