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L-Carnitine
Clinical
Research chemical
Summary
Quaternary ammonium compound that shuttles long-chain fatty acids into mitochondria for β-oxidation; injectable and oral forms used in metabolic and sports contexts.
Categories
Metabolic & Body Comp, Performance
Mechanism
Forms acyl-carnitines for mitochondrial import of long-chain fatty acids; supports energy metabolism and can influence insulin sensitivity and exercise recovery markers in some studies.
Half-life
Hours; tissue storage longer
Routes
Intramuscular injection; Intravenous; Oral
Legal / access
Levocarnitine is an approved drug for deficiency. Sports injectables are a different use-case and quality tier.
Key risks
- Fishy body odor (trimethylamine)
- GI upset oral
- Injection pain
- Seizure risk rare in predisposed
Common claims
- Fat metabolism support
- Training recovery
- Energy
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