Dihydroquercetin

Product Overview

Dihydroquercetin is found in pine plants such as Siberian pine, larch, and other plants like Chinese fringe tree and wild black cherry. It is made from the roots of larch through extraction, concentration, and spray-drying. It is a key active ingredient extracted from larch roots and is rich in dihydroquercetin. The product appears as a fine crystalline or amorphous powder, light yellow, with a slight bitter taste, and a particle size of 80-100 mesh. It dissolves easily in ethanol, acetic acid, and boiling water, slightly in cold water, and is almost insoluble in benzene.

Dihydroquercetin is widely used in food, industry, and agriculture. It serves as a food antioxidant, shock absorber for engine and rocket fuels, industrial lubricant stabilizer, and cosmetic antioxidant. In China, dihydroquercetin is mainly extracted from larch roots discarded after logging in the Changbai Mountains, representing a valuable recycling of waste and an important part of high-tech forestry industry projects. Dihydroquercetin is a dihydroflavonoid compound, part of the vitamin P group, and has broad biological activity including antioxidant, free radical scavenging, vasodilation, and antimicrobial effects.

Production Process

Dihydroquercetin is produced from the roots of artificially cultivated Changbai larch. The process involves peeling, tearing, extraction, concentration, alcohol precipitation, concentrate filtration, extraction, recrystallization, centrifugation, freeze-vacuum drying, and grinding.

Benefits and Effects

It is a powerful antioxidant, with antioxidant capacity 350 times greater than vitamin E, 500 times greater than vitamin C, and 95 times greater than Coenzyme Q10.

Antioxidant: Provides protection for capillaries, 35 times more potent than quercetin, prevents lipid peroxidation, protects liver, nerve cells, red blood cells, and prevents myocardial necrosis.

Enzyme Activity: Inhibits cholesterol esterification and synthesis of triglycerides and phospholipids in liver cancer cells. It can inhibit viral enzyme activity and induce increased cellular enzyme activity without altering distribution. It inhibits aldose reductase and has a slight inhibitory effect on protein kinase.

Cellular Effects: Shows activity against mouse leukemia P388, extending lifespan by 40% and 37% at doses of 150 and 100 mg/kg, respectively. Has a mild reducing effect on cytochrome C.

Antibacterial: Strong antibacterial activity against Staphylococcus aureus, E. coli, Shigella, and Salmonella.

Applications: Food, industry, agriculture, pharmaceuticals, cosmetics

In the food industry, as a bioactive additive, it not only prevents spoilage and extends shelf life but also enhances the preventive and therapeutic properties of food.

In industry, dihydroquercetin's properties surpass many known antioxidants, such as shock absorbers for engine and rocket fuels, and stabilizers for industrial lubricants.

In agriculture, it can be used to produce plant growth regulators, enhancing plant immunity and activity, improving cold and drought resistance, reducing maturation time, and promoting growth and yield.

In pharmaceuticals: Used in vitamin P, antiviral agents, anti-tumor agents, radiation protection agents, capillary protection agents, and for regulating immunity. It can improve blood flow and myocardial contractility in coronary heart disease patients, reduce cholesterol in liver and blood, and quickly alleviate fatigue.

In the pharmaceutical field, its antioxidant and anti-peroxidation properties make it useful for treating diseases caused by oxidative damage from free radicals. It can also be used as a radioprotective drug for patients undergoing radiation therapy or workers in radioactive environments. Additionally, it can serve as an intermediate for synthesizing other pharmaceutical molecules, such as silymarin and drugs for cardiovascular diseases.

In cosmetics and hair care: Used as an antioxidant and protective agent (effectively extending product shelf life), promoting collagen and elastin synthesis, alleviating acne, and improving hair quality, skin whitening, and elasticity.

In creams and soaps: Can delay skin aging and restore youthful vitality.

In hair care products: Promotes hair growth and maintains hair health.

Plant Source

Dihydroquercetin is widely present in olive oil, grapes, citrus fruits, onions, pines (such as Xinjiang larch, Tibet longleaf pine, and cedar), yews, and milk thistle. Most domestic dihydroquercetin is extracted from larch roots discarded after logging in the Changbai Mountains.

Larch is a major species in the Chinese Greater Khingan Range, with abundant timber reserves. It is also a key species for reforestation and forest regeneration in the region. The wood is slightly heavy, moderately hard, prone to splitting, with pale yellow sapwood and heartwood ranging from yellow-brown to reddish-brown. It has a straight grain, fine texture, specific gravity of 0.32-0.52, contains resin, and is durable.

【Plant Characteristics】 Pine family, larch genus, tree up to 35 meters tall, trunk diameter up to 90 cm. Young trees have dark brown bark, branches spreading or nearly horizontal, and an ovate-conic crown. Winter buds are nearly spherical, with dark brown scales and hairy edges, and the terminal scales have long points. Leaves are needle-shaped with a sharp or blunt tip, with a non-prominent midrib. Cones are purple-red when young, becoming oval or elliptical, yellow-brown, brown, or purple-brown before maturity, with seeds being obliquely oval and gray-white. Flowers in May-June, cones mature in September.

【Distribution Range】 Found in the Greater and Lesser Khingan Ranges of China at altitudes of 300-1200 meters. It grows in various environments, including foothills, swamps, peat bogs, meadows, humid north-facing slopes, dry south-facing slopes, moist valleys, and mountain tops. It often forms large, pure forests or mixed forests with birch, alder, mountain ash, red pine, and other coniferous and broadleaf trees. It is also distributed in the Soviet Far East, with type specimens collected from Siberia.

【Growth Environment】 Prefers sunlight and high moisture, thriving in deep, fertile, well-drained northern slopes and hilly areas. It grows best in moist, well-drained, and aerated soils, though it can also grow in dry, barren mountain slopes or waterlogged lowlands, albeit with poor growth. It tolerates low temperatures and can grow normally even at temperatures as low as -50°C.

【Main Value】 Used for building construction, civil engineering, utility poles, vehicles, fine woodworking, and wood fiber industry materials. The trunk can produce resin, and the bark can yield tannin.

Packaging and Storage

【Storage Conditions】 Keep sealed, protected from light, and store in a cool, dry, well-ventilated place.

【Packaging】 Bulk: 25 kg per cardboard drum; samples: 1 kg per aluminum foil bag. Custom packaging available upon request.

【Transportation】 By express or logistics. Domestic express delivery within three days, logistics within five days. Prices generally include domestic shipping costs.

【Shelf Life】 Two years