Naturally occurring quaternary ammonium compound. Investigated in metabolic research for its role in long-chain fatty acid transport across the inner mitochondrial membrane and β-oxidation regulation.
L-Carnitine is a research compound available through our china peptide catalog as a finished, lyophilized vial from an established Chinese manufacturer. It belongs to the Quaternary ammonium compound (zwitterionic amino acid derivative)
Research Areas
Mitochondrial β-oxidation, cardiac metabolism, exercise physiology, carnitine deficiency models, lipid metabolism
Available Variants
| Name | Strength | Pack Size | Purity | Availability |
|---|---|---|---|---|
| L-Carnitine | 600 mg | 10 vials | ≥98% | In Stock |
| L-Carnitine 6000 mg / | 10 ml | 10 vials | — | In Stock |
Specification Highlights
Quality & Testing
Testing method: HPLC / LC-MS . Products are supplied against the specification shown on the applicable product page. The standard catalog purity specification is ≥98% unless otherwise stated. Product-specific specifications and quality-control information may vary by compound and batch. Every batch is tested by the manufacturer for purity and concentration as part of routine quality control, using methods such as HPLC and LC-MS. These results are kept in the manufacturer’s internal quality-control records and are not issued as a separate certificate or document.
Variant Notes
Research material containing l-carnitine.
Research Areas
Mitochondrial Fatty Acid Oxidation Research L-Carnitine is the obligate carrier for long-chain fatty acid entry into the mitochondrial matrix via CPT1/CPT2 (carnitine palmitoyltransferase 1 and 2) and the carnitine-acylcarnitine translocase. Research has used carnitine supplementation, carnitine depletion (by mildronate/meldonium inhibiting carnitine biosynthesis), and the acylcarnitine profile to study β-oxidation flux and its regulation. Carnitine shuttle capacity is a key endpoint in research on mitochondrial dysfunction, fatty acid oxidation disorders, and metabolic flexibility. Cardiac Metabolism Research The heart derives >70% of its ATP from fatty acid oxidation, making carnitine transport essential to cardiac energetics. Research has examined carnitine’s role in cardiac ischemia-reperfusion injury models — where fatty acid oxidation regulation affects recovery — and in heart failure models where shifts from fatty acid to glucose oxidation occur. Acylcarnitine accumulation in ischemic hearts has been studied as a marker of CPT2-limited fatty acid clearance. Exercise and Skeletal Muscle Physiology L-Carnitine’s role in fuel selection during exercise has been examined in human and rodent exercise physiology research. Studies have used stable isotope tracers to examine carnitine’s influence on the fat oxidation/glucose oxidation ratio during exercise of different intensities. The carnitine content of skeletal muscle (approximately 95% of body carnitine is in muscle) and its rate of decline during exercise have been characterized as determinants of fuel flexibility in athletic performance research. ## Sourcing L-Carnitine From China
L-Carnitine is available through our platform as a china peptide sourced directly from an established Chinese manufacturer. Three points define how we handle it:
- Factory-direct, not trader-sourced. We confirm availability and specification with the manufacturer before the order is confirmed. There is no intermediary resale of unknown-origin vials in this catalog.
- Specification before shipment. The purity and concentration specification shown on this page is the manufacturer’s batch specification. Product-specific quality-control information travels with the order.
- Research-use discipline. Like every listing in our catalog, L-Carnitine is supplied for laboratory research use only, under strict research-use terms.
For buyers comparing chinese peptides suppliers, the practical test is whether the seller can name the manufacturer and show the batch documentation. We work the other way around: the manufacturer and the documentation are the offer. Browse the full catalog or see how sourcing works.
Available Variants
| Name | Strength | Pack Size | Purity | Availability |
|---|---|---|---|---|
| L-Carnitine | 600 mg | 10 vials | ≥98% | In Stock |
| L-Carnitine 6000 mg / | 10 ml | 10 vials | — | In Stock |
Specification Highlights
Quality & Testing
Testing method: HPLC / LC-MS . Products are supplied against the specification shown on the applicable product page. The standard catalog purity specification is ≥98% unless otherwise stated. Product-specific specifications and quality-control information may vary by compound and batch. Every batch is tested by the manufacturer for purity and concentration as part of routine quality control, using methods such as HPLC and LC-MS. These results are kept in the manufacturer’s internal quality-control records and are not issued as a separate certificate or document.
Variant Notes
Research material containing l-carnitine.
Research Areas
Mitochondrial Fatty Acid Oxidation Research L-Carnitine is the obligate carrier for long-chain fatty acid entry into the mitochondrial matrix via CPT1/CPT2 (carnitine palmitoyltransferase 1 and 2) and the carnitine-acylcarnitine translocase. Research has used carnitine supplementation, carnitine depletion (by mildronate/meldonium inhibiting carnitine biosynthesis), and the acylcarnitine profile to study β-oxidation flux and its regulation. Carnitine shuttle capacity is a key endpoint in research on mitochondrial dysfunction, fatty acid oxidation disorders, and metabolic flexibility. Cardiac Metabolism Research The heart derives >70% of its ATP from fatty acid oxidation, making carnitine transport essential to cardiac energetics. Research has examined carnitine’s role in cardiac ischemia-reperfusion injury models — where fatty acid oxidation regulation affects recovery — and in heart failure models where shifts from fatty acid to glucose oxidation occur. Acylcarnitine accumulation in ischemic hearts has been studied as a marker of CPT2-limited fatty acid clearance. Exercise and Skeletal Muscle Physiology L-Carnitine’s role in fuel selection during exercise has been examined in human and rodent exercise physiology research. Studies have used stable isotope tracers to examine carnitine’s influence on the fat oxidation/glucose oxidation ratio during exercise of different intensities. The carnitine content of skeletal muscle (approximately 95% of body carnitine is in muscle) and its rate of decline during exercise have been characterized as determinants of fuel flexibility in athletic performance research.
Compound Profile
L-Carnitine ((R)-3-carboxy-2-hydroxy-N,N,N-trimethyl-1-propanaminium) is a quaternary ammonium compound biosynthesized in humans from lysine and methionine, with the final biosynthetic steps requiring vitamin C and iron as cofactors. Its primary biochemical function is facilitating the transport of long-chain fatty acids (C12-C20) across the inner mitochondrial membrane — the rate-limiting step in mitochondrial β-oxidation. Without sufficient carnitine, long-chain fatty acids cannot enter the mitochondrial matrix for energy production, accumulating instead in the cytosol. This essential role in fatty acid metabolism makes L-carnitine a widely used research compound in metabolic, cardiac, and exercise physiology research. Research applications for L-carnitine span several areas: mitochondrial biology and β-oxidation studies, cardiac metabolism (the heart derives the majority of its ATP from fatty acid oxidation), skeletal muscle exercise physiology (where carnitine availability has been hypothesized to influence fuel selection and performance), and clinical nutrition research in conditions of carnitine deficiency (primary and secondary — the latter occurring in renal disease, vegetarian diets, and preterm infants). The acylcarnitine profile in biological fluids is also used as a biomarker for fatty acid oxidation disorders, and L-carnitine challenges are a research tool for examining carnitine shuttle capacity. Peptides of China supplies L-Carnitine as a powder at 99%+ purity, verified by HPLC. Every batch is tested by the manufacturer for purity and concentration as part of routine quality control. All products are for laboratory research use only and are not for human consumption.
Profile
Research Areas
Mitochondrial β-oxidation, cardiac metabolism, exercise physiology, carnitine deficiency models, lipid metabolism
Available Variants
| Name | Strength | Pack Size | Purity | Availability |
|---|---|---|---|---|
| L-Carnitine | 600 mg | 10 vials | ≥98% | In Stock |
| L-Carnitine 6000 mg / | 10 ml | 10 vials | — | In Stock |
Specification Highlights
Quality & Testing
Testing method: HPLC / LC-MS . Products are supplied against the specification shown on the applicable product page. The standard catalog purity specification is ≥98% unless otherwise stated. Product-specific specifications and quality-control information may vary by compound and batch. Every batch is tested by the manufacturer for purity and concentration as part of routine quality control, using methods such as HPLC and LC-MS. These results are kept in the manufacturer’s internal quality-control records and are not issued as a separate certificate or document.
Variant Notes
Research material containing l-carnitine.
Research Areas
Mitochondrial Fatty Acid Oxidation Research L-Carnitine is the obligate carrier for long-chain fatty acid entry into the mitochondrial matrix via CPT1/CPT2 (carnitine palmitoyltransferase 1 and 2) and the carnitine-acylcarnitine translocase. Research has used carnitine supplementation, carnitine depletion (by mildronate/meldonium inhibiting carnitine biosynthesis), and the acylcarnitine profile to study β-oxidation flux and its regulation. Carnitine shuttle capacity is a key endpoint in research on mitochondrial dysfunction, fatty acid oxidation disorders, and metabolic flexibility. Cardiac Metabolism Research The heart derives >70% of its ATP from fatty acid oxidation, making carnitine transport essential to cardiac energetics. Research has examined carnitine’s role in cardiac ischemia-reperfusion injury models — where fatty acid oxidation regulation affects recovery — and in heart failure models where shifts from fatty acid to glucose oxidation occur. Acylcarnitine accumulation in ischemic hearts has been studied as a marker of CPT2-limited fatty acid clearance. Exercise and Skeletal Muscle Physiology L-Carnitine’s role in fuel selection during exercise has been examined in human and rodent exercise physiology research. Studies have used stable isotope tracers to examine carnitine’s influence on the fat oxidation/glucose oxidation ratio during exercise of different intensities. The carnitine content of skeletal muscle (approximately 95% of body carnitine is in muscle) and its rate of decline during exercise have been characterized as determinants of fuel flexibility in athletic performance research.