Supplements - Nutrition

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Supplements - Nutrition

Quercetin

NEWS:

Quercetin might help with spring allergies “Quercetin belongs to a big group of plant chemicals known as flavonoids, which give flowers and fruits their color. Many foods are high in quercetin, including apples and onions (especially the outer rings). Quercetin has anti-inflammatory and antioxidant properties. It also has anti-allergy properties — at least in the lab. One study found that quercetin stabilized special cells called mast cells. These cells secrete a chemical called histamine, which contributes to a lot of allergy symptoms, such as runny noses and itching. By stabilizing the mast cells, quercetin helped to decrease the release of histamine, which could help decrease allergy symptoms. In this study, quercetin worked just as well as cromolyn, which is a prescription medication sometimes used for allergies.“

Substance Found In Fruits And Vegetables Reduces Likelihood Of The Flu “Quercetin, a close chemical relative of resveratrol, is present in a variety of fruits and vegetables, including red onions, grapes, blueberries, tea, broccoli and red wine. It has been shown to have anti-viral properties in cell culture experiments and some animal studies, but none of these studies has looked specifically at the flu. The new study was conducted using mice, but if quercetin provides a similar benefit for humans, it could help endurance athletes, soldiers and others undergoing difficult training regimens, as well as people under psychological stress, according to Davis.“

ARTICLES:

The Fruit That Fights the Flu “Apples (and red onions, broccoli, and tea) are great sources of quercetin -- a flavonoid that may stave off the influenza virus when the body is under stress.”

JOURNAL ARTICLES:

Health effects of quercetin: From antioxidant to nutraceutical. (Eur J Pharmacol. 2008)

Protective effect of quercetin in primary neurons against Abeta(1-42): relevance to Alzheimer's disease. (J Nutr Biochem. 2008)

Pure dietary flavonoids quercetin and (–)-epicatechin augment nitric oxide products and reduce endothelin-1 acutely in healthy men (American Journal of Clinical Nutrition 2008) “Conclusions: Dietary flavonoids, such as quercetin and (–)-epicatechin, can augment nitric oxide status and reduce endothelin-1 concentrations and may thereby improve endothelial function. “

Quercetin Ameliorates Metabolic Syndrome and Improves the Inflammatory Status in Obese Zucker Rats. (Obesity (Silver Spring). 2008)

Quercetin reduces susceptibility to influenza infection following stressful exercise. (Am J Physiol Regul Integr Comp Physiol. 2008)

Quercetin, kaempferol and biapigenin from Hypericum perforatum are neuroprotective against excitotoxic insults. (Neurotox Res. 2008)

The dietary bioflavonoid, quercetin, selectively induces apoptosis of prostate cancer cells by down-regulating the expression of heat shock protein 90. (Prostate. 2008)

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