Shikimic Acid
Rhodiola Rosea Extract
Milk thistle Extract
Great Burdock Fruit Extract
Huperzine A
Tribulus Terrestris Extract
Rhodiola Rosea Extract
Red Clover Extract
Black Cohosh Extract
Lucid Ganoderma Extract
Astragalus Extract
Auriculate Swallowwort Root Tuber Extract
Wolfberry Extract
Puerariae Extract
Artichoke Extract
Thyme Extract
White Kidney Bean Extract
Common Cnidium Fruit Extract
Ginger Root Extract
Hawthorn Extract
Nettle Extract
Horsetail Extract
Horse Chestnut Extract
Wild Yam Extract
Schisandra Extract
Echinacea Extract
Magnolia Back Extract
Siberian Ginseng Extract
Yohimbine hydrochloride
Angelica Extract
Huperzine A
Hypericum Extract
Abiochanin A


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(CAS#: 6151-25-3)


What is Quercetin?

Quercetin is part of the coloring found in the skins of apples and red onions. It is isolated and sold as a nutritional supplement.

What Does Quercetin Do?

Quercetin is a powerful anti-oxidant. It is also a natural anti-histamine, and anti-inflammatory. Research shows that quercetin may help to prevent cancer, especially prostate cancer.

Why Would I Want to Use Quercetin?

Quercetin's anti-histamine action may help to relieve allergic symptoms and asthma symptoms. The anti-inflammatory properties may help to reduce pain from disorders such as arthritis. Men who are concerned about prostate problems would also benefit from quercetin. Quercetin may also help reduce symptoms like fatigue, depression and anxiety.

Where Do I Find Quercetin?

To get more quercetin, you can increase your intake of apples and red onions, which will improve your diet. If you need more therapeutic impact, quercetin is available in health food stores and online

Melting points 310 ~ 350 íŠ

Chemical Name: 3,3',4',5,7-Pentahydroxyflavone dihydrate


Flavonoid with anticancer activity. Mitochondrial ATPase and phosphodiesterase inhibitor. Inhibits PI3-kinase activity and slightly inhibits PIP Kinase activity. Has antiproliferative effects on cancer cell lines; reduces cancer cell growth via type II estrogen receptors; has been reported to arrest human leukemic T cells in late G1phase of the cell cycle.


Quercetin offers a variety of potential therapeutic uses, primarily in the prevention and treatment of the following conditions:
Allergies, asthma, and hives: Quercetin may inhibit histamine release from basophils (a type of white blood cell) and mast cells (large cells in connective tissue).

Canker sores: Quercetin may reduce the frequency of mouth sores and produce mild symptomatic relief.

Heart disease: Individuals with very low intakes of flavonoids are at higher risk for heart disease.

Infection: Quercetin may control the spread of certain viruses within the body.

Rheumatoid arthritis: Quercetin may help reduce tissue destruction.

Quercetin may also be beneficial in the treatment of dysentery (an intestinal infection causing severe diarrhea), gout (a disease where crystals of uric acid, a component of urine, are deposited in the joints and cause swelling), and psoriasis (a chronic skin disease).

Quercetin is a flavonoid that forms the "backbone" for many other flavonoids, including the citrus flavonoids rutin, hesperidin, naringin and tangeritin. Quercetin is found to be the most active of the flavonoids in studies, and many medicinal plants owe much of their activity to their high quercetin content. Quercetin has demonstrated significant anti-inflammatory activity because of direct inhibition of several initial processes of inflammation. For example, it inhibits both the manufacture and release of histamine and other allergic/inflammatory mediators. In addition, it exerts potent antioxidant activity and vitamin C-sparing action.

Together with rhamnose, it forms a glycoside quercitrin.

Quercetin also shows remarkable anti-tumour properties. A recent study in the British Journal of Cancer shows that in combination with ultrasound at 20 KHz for 1 minute duration, skin and prostate cancers show a 90% mortality within 48 hours with no visible mortality of normal cells. Note that ultrasound also promotes topical absorption by up to 1,000 times making the use of topical quercetin and ultrasound wands an interesting proposition.

Quercetin may have positive effects in combating or helping to prevent cancer, prostatitis, heart disease, cataracts, allergies/inflammations, and respiratory diseases such as bronchitis and asthma.

Foods rich in quercetin include apples, black & green tea, onions (higher concentrations of quercetin occur in the outermost rings), raspberries, red wine, red grapes, citrus fruits, broccoli & other leafy green vegetables, and cherries. A study by the University of Queensland, Australia, has also indicated the presence of quercetin in varieties of honey, including honey derived from eucalyptus and tea tree flowers.