Quercetin Powder

1. We offer a full range of quercetin products, including anhydrous quercetin, quercetin dihydrate, dihydroquercetin, and liposomal quercetin. All products meet international quality standards and fully satisfy the diverse application needs of the food, health supplement, and cosmetic industries.

2. We own our own professional manufacturing plant, achieving an integrated model of R&D, production, and sales. This allows us to strictly control the entire production process, ensuring product stability, and also provides you with more competitive prices-our core advantage.

3. We have obtained a series of authoritative international certifications, including cGMP, FSSC22000, HACCP, HALAL, KOSHER, ISO9001, ISO22000, and FDA. All certifications are compliant and valid, fully meeting the market access requirements of various countries and regions, ensuring smooth customs clearance and product registration for your global orders.

Quercetin powder is a naturally occurring flavonol-based active substance widely found in plants, possessing diverse biological activities. This component can actively capture and chelate free radicals, effectively inhibiting lipid peroxidation and exhibiting excellent antioxidant properties.

As a high-quality natural antioxidant, quercetin can regulate multiple intracellular and extracellular signaling pathways, intervening in the development of various adverse physiological reactions. However, natural quercetin suffers from poor water solubility and limited absorption and utilization by the body, which to some extent restricts its practical application.

Currently, through targeted molecular structure modification techniques, such as hydroxyl group modification, carbonyl group optimization, and adjustment of A-ring and B-ring structures, novel quercetin derivatives can be synthesized. The improved products exhibit stronger solubility, significantly improved bioavailability, and enhanced overall biological activity, providing reliable support for large-scale applications in health protection and related fields.

1. Antioxidant Activity
Quercetin, with its unique molecular structure, achieves antioxidant protection through multiple pathways, reducing damage to the body caused by oxidative stress.

• Scavenging Reactive Oxygen Radiata (ROR): The abundant phenolic hydroxyl groups within the molecule release reactive hydrogen, directly neutralizing and inactivating excess RROS. Simultaneously, it regulates glutathione secretion, strengthens the endogenous antioxidant system, and reduces cellular oxidative apoptosis.
• Chondrating Harmful Metal Ions: It can bind to metal ions such as iron and copper, blocking metal ion-mediated lipid peroxidation and free radical generation, reducing organ oxidative damage, and protecting DNA from oxidative damage.
• Inhibiting Lipoprotein Oxidation: It effectively inhibits the oxidative modification of low-density lipoprotein (LDL), regulates the expression of key proteins, improves abnormal lipid metabolism, and avoids oxidation and liver damage induced by a high-fat environment.

2. Anti-inflammatory and Immunomodulatory Effects

Anti-inflammatory properties are the core physiological value of quercetin. This substance can effectively downregulate the secretion of various pro-inflammatory factors and inhibit the abnormal expression of inflammatory enzymes. Even after being metabolized into derivatives in the body, it can still stably maintain its anti-inflammatory efficacy, bidirectionally regulate the body's immune status, and soothe chronic inflammatory responses.

3. Antiviral physiological effects

Quercetin can act on key targets of viral action, blocking viral invasion of host cells and inhibiting viral replication and proliferation. It has inhibitory effects on multiple strains of influenza, hepatitis C, etc., and can destroy the infective activity of viral particles. By regulating the expression of key enzymes in the body, it reduces viral spread and damage.

The preparation methods of quercetin include extraction and separation, acid hydrolysis, enzymatic conversion, etc. Among them, enzymatic conversion is the most practical.
Natural extraction and isolation
Since the content of quercetin in plants is only a few thousandths to a few thousandths, and its extraction and separation is difficult and costly, extracting quercetin directly from plants is not practical in production. However, when analyzing and identifying flavonoids or preparing analytically pure samples, quercetin extraction and separation technology must be used.
acid hydrolysis
The rutin (rutin) of quercetin is widely distributed in nature and has high content. For example, the content in sophora rice is as high as more than 20%. Rutin is first extracted from Sophora japonica and then acid hydrolyzed to produce quercetin. This method is feasible for production.
The main extraction methods of rutin include alkali extraction and acid precipitation, organic solvent extraction, and dipping. Among them, the alkali extraction and acid precipitation method is the most practical. Choose a 0.05% NaOH solution and boil it for 20 minutes, filter it while it is hot, and extract it 4 times with the same method to obtain an alkali aqueous solution of rutin. Add acid to precipitate it. After filtering, add acid to hydrolyze it to obtain water-insoluble quercetin. Filter , washed with water and dried to obtain quercetin solid.
enzyme conversion method
Enzymatic hydrolysis of rutin is used to prepare a large amount of quercetin monomer, which is less abundant in plants. The operation is simple and safe. The whole process is economical and practical. The output is large and suitable for industrial production. The purity of the product is >90%, which can meet the needs of food and clinical applications. . Therefore, enzymatic conversion is undoubtedly a promising preparation method.

1.Quercetin Powder applied in food field, it is mainly used in kinds of beverage, liquor and foods to enhance human immunity and anti-aging.

2. Used in the field of health products, it has a good effect on protecting the cardiovascular system

Quercetin Powder is widely present in the stem bark, flowers, leaves, buds, seeds and fruits of many plants, mostly in the form of glycosides, such as rutin, quercetin, hyperoside, etc. Quercetin can be obtained by acid hydrolysis Cortex. Among them, the content of buckwheat stems and leaves, sea buckthorn, hawthorn, and onion is higher. Quercetin is also found in many foods, such as onions, shallots, asparagus, cabbage, mustard greens, green peppers, chicory, grapefruit, lettuce, hawthorn, apples, mangoes, plums, radishes, blackcurrants, potatoes and spinach, etc. . In addition, there are more than 100 kinds of medicinal plants (such as Sophora japonica, Platycladus orientalis, galangal, coltsfoot, Morus alba, Panax notoginseng, Ginkgo biloba, elderberry, etc.) all contain this ingredient.

Quercetin content in various fruits and vegetables

Research on the content of quercetin in tea, fruit juice and wine has shown that the content of quercetin in some beverages (such as beer, coffee, chocolate milk, white wine) is below 1 mg/L, while the content of quercetin in red wine is 4~16 mg/L, grape juice 7~9 mg/L; in the juice, in addition to lemon juice (7 mg/L), tomato juice (13 mg/L) contains higher quercetin, other juices have higher content Low, generally below 5 mg/L; the highest content of quercetin in tea (10-25 mg/L).

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