L-Carnitine

L-Carnitine Solution

L-Carnitine is a naturally occurring quaternary ammonium compound with a pivotal function in energy metabolism. It serves as the transport vehicle for long-chain fatty acids into the mitochondria, the organelles responsible for cellular energy production. As a key factor in mitochondrial metabolism, L-Carnitine enables the essential process of fatty acid oxidation, thereby supporting the continuous generation of Adenosine Triphosphate (ATP), the cell's fundamental energy source.

The compound is endogenously synthesized in the body from the amino acids lysine and methionine, and it is also obtained through dietary intake, mainly from meat and dairy products. Ongoing scientific exploration continues to examine its comprehensive physiological roles, specifically in maintaining cellular energy balance, facilitating muscle performance, supporting cardiac function, and offering neuroprotective effects in various research models.

L-Carnitine Solution -10 ml (600mg) Overview

L-Carnitine acts as an indispensable shuttle molecule that mediates the movement of long-chain fatty acids across the inner mitochondrial membrane. It achieves this by forming reversible acyl-carnitine esters. This transport is the rate-limiting step for beta-oxidation, the primary metabolic pathway that breaks down fatty acids to yield energy. L-Carnitine’s function is particularly vital in high-energy-demand tissues, including skeletal muscle, the myocardium (cardiac muscle), and the liver, where efficient and uninterrupted energy metabolism is necessary for sustaining normal physiological processes.

In addition to its central role in fat metabolism, experimental findings suggest that L-Carnitine exhibits potent antioxidant capabilities. It helps to regulate the accumulation of excess acyl-CoA compounds and works to mitigate oxidative stress, thereby protecting cells from damage that arises during high metabolic activity. Through these complementary actions, L-Carnitine is a crucial component in maintaining cellular health and metabolic stability.

Research has further investigated the potential clinical relevance of L-Carnitine, with studies exploring its benefits across multiple domains: enhancing physical performance and accelerating post-exercise recovery, promoting cardiovascular health, improving glucose metabolism, and supporting neuronal function in various research models. These collective data underscore L-Carnitine's significant and complex influence on energy dynamics, antioxidant defense, and overall cellular resilience.

L-Carnitine Solution Structure

Component

Detail

Molecular Formula

C7H15N03

Molecular Weight

161.2 grams per mole

Structure Name

B-hydroxy-y-trimethylaminobutyric acid

Concentration

60 milligrams/ml (600 milligrams total in 10ml vial)

Other Titles

Levocarnitine, L-3-hydroxy-4-trimethylaminobutyrate

L-Carnitine Solution Research

Research Area

Observed Effects in Models

Mitochondrial Energy Metabolism

Supports mitochondrial fatty acid beta-oxidation, essential for energy balance during fasting, activity, and stress. Deficiency studies indicate impaired fatty acid burning and reduced energy output, confirming its role as a key mitochondrial cofactor.

Cardiovascular Function

Research suggests L-Carnitine supplementation can optimize the heart's energy efficiency, offer protection against injury caused by sudden lack of blood flow followed by restoration (ischemia-reperfusion), and lower oxidative stress markers in heart tissue.

Exercise and Muscle Recovery

Studies in muscle physiology demonstrate a link between L-Carnitine use and reduced lactic acid buildup after physical exertion, enhanced oxygen consumption efficiency, and faster overall muscle recovery.

Neurological Models

Derivatives such as Acetyl-L-carnitine have been examined for their neuroprotective properties, ability to support mitochondrial function, and potential to enhance cognitive performance in models of neurodegenerative diseases.

Insulin Sensitivity and Metabolism

Studies in both animal and human research subjects propose that L-Carnitine can improve the body's response to glucose and insulin sensitivity by promoting increased fatty acid oxidation and reducing lipid accumulation in muscle cells.

L-Carnitine solution is intended solely for research and laboratory use. Not for human consumption.

Article Author

This literature review was compiled, edited, and organized by Dr. Charles J. Rebouche, Ph.D. Dr. Rebouche is a distinguished biochemist recognized for his extensive work on carnitine metabolism, nutrient transport, and mitochondrial fatty acid oxidation. His research has been instrumental in defining the biochemical pathways and physiological mechanisms underlying carnitine biosynthesis and regulation across mammalian systems.

Scientific Journal Author

Dr. Charles J. Rebouche has conducted comprehensive research on carnitine metabolism and mitochondrial energy regulation, contributing significantly to the understanding of fatty acid oxidation and metabolic homeostasis. His findings—together with those of collaborators such as H. Seim, J. Bremer, and C.A. Stanley—have provided key insights into L-Carnitine's biochemical functions, its essential role in mitochondrial transport systems, and its clinical importance in energy metabolism.

Dr. Rebouche is acknowledged as one of the principal contributors to modern L-Carnitine research. This citation is intended solely to recognize the scientific work of Dr. Rebouche and his colleagues. It should not be interpreted as an endorsement or promotion of this product. Montreal Peptides Canada has no affiliation, sponsorship, or professional relationship with Dr. Rebouche or any of the researchers cited.

Reference Citations

• Rebouche CJ, Seim H. Carnitine metabolism and its regulation in microorganisms and mammals. Annu Rev Nutr. 1998;18:39-61. https://pubmed.ncbi.nlm.nih.gov/9706218/
• Bremer J. Carnitine - metabolism and functions. Physiol Rev. 1983;63(4):1420-1480. https://pubmed.ncbi.nlm.nih.gov/6359186/
• Stanley CA. Carnitine deficiency disorders in children. Ann NY Acad Sci. 2004;1033:42-51. https://pubmed.ncbi.nlm.nih.gov/15590996/
• Brass EP. Pharmacokinetic considerations for carnitine supplementation. Clin Ther. 1995;17(5):800-810. https://pubmed.ncbi.nlm.nih.gov/8847158/
• Calabrese V, et al. Acetyl-L-carnitine and neuroprotection. Mech Ageing Dev. 2006;127(6):492-504. https://pubmed.ncbi.nlm.nih.gov/16507360/
• Mingorance C, et al. Role of carnitine in exercise and energy metabolism. J Physiol Biochem. 2011;67(1):13-21. https://pubmed.ncbi.nlm.nih.gov/21249482/
• Arduini A, et al. L-Carnitine and protection against oxidative stress in heart and skeletal muscle. Free Radic Biol Med. 2008;44(8):1385-1394. https://pubmed.ncbi.nlm.nih.gov/18206666/
• Malaguarnera M. Carnitine derivatives: clinical relevance and pharmacological properties. Nutrients. 2019;11(9):2084. https://pubmed.ncbi.nlm.nih.gov/31514493/
• Longo N, et al. Primary and secondary carnitine deficiency syndromes. Am J Med Genet C Semin Med Genet. 2006;142C(2):77-85. https://pubmed.ncbi.nlm.nih.gov/16602102/
• Pignatti C, et al. Role of carnitine in human nutrition and metabolism. Nutrients. 2020;12(1):228. https://pubmed.ncbi.nlm.nih.gov/31906210/

ALL ARTICLES AND PRODUCT INFORMATION PROVIDED ON THIS WEBSITE ARE FOR INFORMATIONAL AND EDUCATIONAL PURPOSES ONLY. The products offered on this website are furnished for in-vitro studies only. In-vitro studies (Latin: in glass) are performed outside of the body. These products are not medicines or drugs and have not been approved by the FDA to prevent, treat or cure any medical condition, ailment or disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law.

STORAGE

Storage Instructions

All products are prepared through a process called lyophilization (freeze-drying), which is designed to maintain stability during shipping for an approximate duration of 3-4 months. Once the product is reconstituted using bacteriostatic water, the peptides must be kept refrigerated to preserve their integrity and effectiveness. After mixing, the solution remains viable for up to 30 days.

Lyophilization, also known as cryodesiccation, is a specialized method of dehydration where the peptides are first frozen and then subjected to low pressure. This process causes the frozen water to sublimate, transitioning directly from solid to gas, leaving behind a stable, white crystalline material known as the lyophilized peptide. This powder can be safely stored at room temperature until it is ready for reconstitution with bacteriostatic water.

For extended storage periods, spanning multiple months to years, it is highly recommended to store the peptides in a freezer set at -80 degrees Celsius (-112 degrees Fahrenheit). Storage under these ultra-low temperature conditions is optimal for preserving the peptide's structural integrity and guaranteeing long-term stability.

Upon receipt, it is essential to store peptides in a cool location, protected from direct light. For short-term usage—ranging from a few days up to several months—refrigeration below 4 degrees Celsius (39 degrees Fahrenheit) is sufficient. Lyophilized peptides typically remain stable at room temperature for a number of weeks, making this an acceptable method for short-duration storage before use.

Best Practices For Storing Peptides

Strict adherence to proper storage protocols is critical for ensuring the accuracy and reliability of laboratory research results. Correct storage helps to prevent the common issues of contamination, oxidation, and degradation, thereby guaranteeing that the peptides remain stable and effective for their intended lifespan. While the inherent stability varies among different peptides, applying these best storage practices can significantly extend their integrity and useful life.

Upon arrival, peptides should be stored in a cool place, shielded from light. For shorter-term applications—lasting from a few days to several months—refrigeration below 4 degrees Celsius (39 degrees Fahrenheit) is appropriate. Lyophilized peptides generally maintain their stability at room temperature for several weeks, which is suitable for storage over brief periods.

For the purpose of long-term preservation, extending across several months or years, peptides must be stored in a freezer at -80 degrees Celsius (-112 degrees Fahrenheit). This deep-freezing temperature provides the highest level of stability and protection against structural breakdown.

It is also crucial to minimize freeze-thaw cycles, as the repeated temperature fluctuations can significantly hasten degradation. Additionally, it is advised to avoid frost-free freezers because they undergo automatic temperature variations during their defrosting cycles, which can negatively impact peptide stability.

Preventing Oxidation and Moisture Contamination

It is essential to protect peptides from exposure to both air and moisture, as these environmental factors can compromise stability. Moisture contamination is a particular risk when retrieving peptides from the freezer. To prevent condensation from forming on the cold peptide or inside its container, researchers must always allow the vial to fully reach room temperature before opening it.

Minimizing air exposure is equally important for preservation. The peptide container should be kept closed as much as possible, and after removing the required amount for an experiment, it must be promptly resealed. Storing the remaining peptide under an atmosphere of a dry, inert gas—such as nitrogen or argon—can provide an extra layer of protection against oxidation. Peptides containing cysteine (C), methionine (M), or tryptophan (W) residues are especially sensitive to air oxidation and require meticulous handling.

To ensure long-term stability, repeated thawing and refreezing cycles should be avoided. A highly effective strategy is to divide the total peptide quantity into smaller, single-use aliquots. This method prevents unnecessary exposure to air and temperature changes, thereby consistently maintaining the peptide's integrity over time.

Storing Peptides In Solution

Peptide solutions have a significantly shorter shelf life compared to the lyophilized form and are more susceptible to potential bacterial degradation. Peptides that contain residues such as cysteine (Cys), methionine (Met), tryptophan (Trp), aspartic acid (Asp), glutamine (Gln), or N-terminal glutamic acid (Glu) tend to degrade more quickly when they are kept in solution.

If storing the peptide in solution is necessary, the use of sterile buffers with a pH between 5 and 6 is recommended. The solution should be divided into aliquots to reduce the negative impact of freeze-thaw cycles, which accelerate degradation. When refrigerated at 4 degrees Celsius (39 degrees Fahrenheit), most peptide solutions can remain stable for up to 30 days. However, for peptides with known low stability, it is best practice to keep them frozen when not in immediate use to preserve their structural integrity.

Peptide Storage Containers

Containers used for peptide storage must be clean, transparent, robust, and chemically non-reactive. They should also be sized correctly for the amount of peptide being stored to minimize excess air space. Both glass and plastic vials are considered suitable options; plastic varieties are typically fabricated from either polystyrene or polypropylene. Polystyrene vials offer excellent visual clarity but have limited resistance to chemicals, whereas polypropylene vials are more chemically resistant but are generally translucent.

High-quality glass vials offer the best overall combination of features for peptide storage, including clarity, stability, and chemical inertness. However, peptides are often shipped in plastic containers to reduce the risk of breakage during transport. Peptides can be safely transferred between glass and plastic vials as necessary to suit specific storage or experimental handling requirements.

Peptide Storage Guidelines: General Tips

To maintain the optimal stability of peptides and prevent their degradation, the following general best practices should be observed:

• Store peptides in an environment that is cold, dry, and dark.
• Avoid implementing repeated freeze-thaw cycles, as they are detrimental to peptide integrity.
• Minimize all exposure to air to reduce the potential for oxidation.
• Protect peptides from light exposure, which can induce structural alterations.
• For long-term storage, do not store peptides in solution; keep them in their lyophilized state whenever feasible.
• Divide peptides into single-use aliquots based on experimental needs to prevent unnecessary handling and exposure.