Carnosine peptide is a small bioactive endogenous dipeptide naturally found in vertebrates, formed via peptide bond condensation between β-alanine and L-histidine. It appears as a colorless crystalline solid with excellent water solubility, stable physicochemical properties and superior biocompatibility, exhibiting negligible biological toxicity. It efficiently participates in multiple physiological processes including the regulation of oxidative stress, protection of lipid metabolism, and maintenance of cellular homeostasis.Compared with single antioxidants such as Vitamin C and Vitamin E, the peptide boasts unique broad-spectrum antioxidant advantages. It can directly eliminate various oxidative toxicants, interrupt oxidative chain reactions, and activate the body's endogenous antioxidant system, thereby establishing a multi-layer antioxidant defense network featuring "direct scavenging – reaction blocking – endogenous defense". Meanwhile, it also exerts auxiliary physiological functions including anti-glycation, metal ion chelation and cell membrane repair.
Our Products Form
Carnosine COA
Mechanism of Broad-Spectrum Antioxidant Activity
Direct Scavenging of Diverse Reactive Oxidative Toxicants (ROS and RNS)
The core trigger of oxidative stress is excessive accumulation of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in the body. These highly reactive free radicals continuously attack biological macromolecules such as cellular nucleic acids, proteins and membrane lipids, triggering structural breakdown of cells, functional disorders and tissue lesions. Benefiting from its distinctive molecular structure, carnosine peptide efficiently and directly eliminates a wide range of free radicals to curb oxidative damage at the source.
The imidazole group carried by the L-histidine residue within the product molecule serves as the core functional moiety for free radical scavenging.
This structure possesses strong electron-donating activity, enabling rapid quenching of various highly reactive oxidative free radicals through electron transfer and proton neutralization. The intermediate products generated after the reaction are chemically stable and will not induce secondary oxidative damage, overcoming the drawback of certain antioxidants that produce toxic intermediates during free radical elimination.
In terms of ROS scavenging, the product delivers remarkable clearance efficacy against two major pathogenic free radicals: hydroxyl radicals and superoxide anions. The hydroxyl radical is the most cytotoxic type of ROS in the human body. Lacking specific metabolic pathways, it randomly attacks nearly all biological molecules and acts as the primary inducer of cellular oxidative injury.
Relevant pulse radiolysis experiments confirm that the product can precisely bind hydroxyl radicals and convert them into low-activity stable intermediates via base-catalyzed dehydration, completely eliminating their oxidative toxicity with a significantly higher scavenging efficiency than conventional small-molecule antioxidants. For superoxide anions, the product stabilizes the unpaired electrons of free radicals through the conjugated structure of the imidazole ring, halting their dismutation into hydrogen peroxide and hydroxyl radicals and restraining the cascade amplification of ROS.
For RNS neutralization, it effectively counteracts two key nitrogen-derived oxidative toxicants: nitric oxide and peroxynitrite. Under physiological conditions, trace nitric oxide participates in vasodilation, nerve conduction and other vital processes. However, excessive nitric oxide undergoes oxidative modification under oxidative stress and induces cytotoxicity.
It directly binds free nitric oxide and inhibits its abnormal accumulation. Peroxynitrite, a highly toxic RNS formed by the reaction between nitric oxide and superoxide anions, triggers protein nitration and DNA strand breaks. It neutralizes peroxynitrite activity via molecular coordination and blocks its oxidative destruction of cells. It achieves broad-spectrum scavenging of both ROS and RNS oxidative systems to comprehensively reduce systemic oxidative stress levels.
Block Lipid Peroxidation Chain Reactions and Preserve Cell Membrane Integrity
The cell membrane acts as the primary barrier shielding cells from external damage, mainly composed of lipids including unsaturated fatty acids and phospholipids. It is highly susceptible to free radical attacks that initiate lipid peroxidation, triggering persistent chain oxidative damage and ultimately leading to disrupted membrane permeability, structural rupture and cell apoptosis.
Carnosine peptide precisely targets the entire lipid peroxidation process, especially efficiently neutralizing 4-hydroxynonenal (4-HNE), the core toxic product of lipid degradation, to fully terminate oxidative chain reactions and realize dual protection of cell membrane structure and function.
Lipid peroxidation is a typical cyclic chain reaction consisting of three phases: initiation, propagation and termination. Most conventional antioxidants only intervene in a single stage, whereas it modulates the whole reaction process. During initiation, it scavenges initial free radicals that trigger lipid oxidation and reduces oxidative activation of unsaturated fatty acids. During propagation, it breaks the chain transfer of lipid free radicals and inhibits massive generation of lipid peroxides.
4-HNE is a highly toxic aldehyde metabolite produced during lipid peroxidation, as well as a key toxic mediator driving cell membrane injury, apoptosis and tissue inflammation. With strong electrophilicity, 4-HNE covalently binds biological macromolecules on cell membranes such as proteins, phospholipids and amino acids, resulting in protein denaturation and lipid cross-linking that undermine membrane fluidity and integrity. It also penetrates into cells to damage organelles including mitochondria and endoplasmic reticulum, aggravating oxidative stress injury.
The amino groups and imidazole rings of the peptide undergo specific nucleophilic addition reactions with 4-HNE, rapidly binding and neutralizing its toxic activity to convert it into non-toxic stable conjugates and prevent 4-HNE from attacking cell membranes and intracellular structures. In addition, it inhibits secondary lipid oxidation induced by 4-HNE and completely terminates the lipid peroxidation chain cycle. It effectively maintains the barrier function of cell membranes and lowers the risks of cellular damage and tissue lesions stemming from oxidative stress.
Activate Endogenous Antioxidant Pathways to Establish Long-Term Antioxidant Defense Systems
The antioxidant capacity of the product extends beyond exogenous direct scavenging of oxidative toxicants. It regulates core antioxidant signaling pathways in the body to activate the endogenous antioxidant system and boost intrinsic antioxidant capacity, forming a sustained and stable endogenous defense mechanism distinct from short-term supplementary exogenous antioxidants.
Nrf2 (Nuclear Factor Erythroid 2-Related Factor 2) is the master transcription factor governing the body's oxidative stress response and the pivotal target of endogenous antioxidant pathways. Under normal physiological conditions, Nrf2 binds to the Keap1 protein in the cytoplasm and remains in an inactivated, unstable state prone to ubiquitination and degradation. Upon oxidative stress, the activation status of the Nrf2 pathway directly determines cellular antioxidant and anti-damage capacity.
Carnosine peptide activates the Nrf2 signaling pathway through a specific regulatory mechanism: it effectively inhibits the binding between Keap1 and Nrf2, reduces ubiquitin-mediated degradation of Nrf2, and markedly improves the protein stability and expression level of cytoplasmic Nrf2. Large quantities of activated Nrf2 translocate into the nucleus and specifically bind to antioxidant response elements (AREs), initiating transcription and expression of downstream antioxidant target genes and upregulating the synthesis efficiency of various endogenous antioxidant enzymes at the genetic level.
Superoxide dismutase (SOD) and glutathione (GSH) are the two most vital endogenous antioxidants in the human body. SOD efficiently dismutates superoxide anions to block initial ROS generation, while glutathione eliminates intracellular peroxides and repairs oxidatively damaged biomolecules. The two substances synergistically form the fundamental antioxidant defense line of the body.
After regulation and activation by the peptide, the expression and activity of intracellular SOD and glutathione are significantly elevated. Meanwhile, it synchronously upregulates levels of multiple antioxidant enzymes including catalase and glutathione peroxidase, comprehensively strengthening cellular endogenous antioxidant, detoxification and repair capabilities. This mechanism delivers persistent antioxidant protection independent of continuous supplementation of external antioxidants, fundamentally enhancing the body's resistance to oxidative stress. It alleviates chronic oxidative damage, cellular senescence and cumulative inflammation over the long term, combining short-term oxidative toxicant clearance with long-term endogenous protection to achieve dual antioxidant efficacy.
Biosynthetic Mechanism
The biosynthesis of the peptide mainly takes place within cells of target tissues including human skeletal muscle and brain tissue. It is a specific condensation reaction catalyzed by specialized enzymes and fueled by ATP, featuring precise and controllable synthesis and high substrate utilization efficiency.
Its synthetic raw materials are β-alanine and L-histidine. L-histidine is an essential amino acid that cannot be synthesized autonomously by the human body and must be acquired through daily dietary intake. β-alanine can be produced by hepatic metabolism of pyrimidines, polyamines and other substances, or supplemented via meat-based diets; it acts as the rate-limiting substrate governing the product synthesis efficiency.
The entire synthetic reaction is specifically catalyzed by carnosine synthase (CARNS1, EC 6.3.2.11) encoded by the CARNS1 gene. Belonging to the ATP-grasp superfamily of ligases, this enzyme relies on energy released from ATP hydrolysis to drive the forward reaction. The specific synthetic reaction formula is as follows:β-alanine + L-histidine + ATP → Carnosine + AMP + Pyrophosphate
No byproducts accumulate during synthesis. The generated carnosin is directly stored in muscle and nerve tissues to participate in systemic antioxidant activity and homeostasis regulation. Excess substrates are decomposed and utilized via regular metabolic pathways without imposing metabolic burdens on the body.
References
- Antioxidant and Neuroprotective Effects of Carnosine: Therapeutic Implications in Neurodegenerative Diseases[J]. Antioxidants, 2022, 11(5): 848.
- Physiology and Pathophysiology of Carnosine[J]. Physiological Reviews, 2013, 93(4): 1803-1845.
- Carnosine-a natural bioactive dipeptide: bioaccessibility, bioavailability and health benefits[J]. Food & Function, 2019, 10(7): 3899-3916.
- Caruso G, Di Pietro L, Cardaci V, Maugeri S, Caraci F. The therapeutic potential of carnosine: Focus on cellular and molecular mechanisms. Curr Res Pharmacol Drug Discov. 2023 Mar 7;4:100153. doi: 10.1016/j.crphar.2023.100153. PMID: 37441273; PMCID: PMC10333684.
- Carnosine as a therapeutic supplement.(https://www.ebsco.com/research-starters/complementary-and-alternative-medicine/carnosine-therapeutic-supplement)
FAQ
What foods are high in carnosine?
+
-
Carnosine is an amino acid compound found almost exclusively in animal tissues, meaning the best dietary sources are meats and fish. The richest sources include beef, pork, poultry (like turkey and chicken), and fish such as tuna. Plant-based foods do not contain carnosine.
What are the symptoms of low carnosine?
+
-
Extreme drowsiness and seizures are common signs of carnosinemia in children under one year. Children with this condition have slowed growth, low muscle tone, motor difficulties, and intellectual developmental delays. Myoclonic seizures can occur with seizures.
Hot Tags: carnosine peptide, China carnosine peptide manufacturers, suppliers, hcg approved protein powder, hcg puretrig 5000iu, noctiva tablets, octreotide 100, somatostatin injection 3 mg, the best hcg drops for weight loss
