Quercetin

Quercetin is actually a flavonol derived from plants, such as vegetables, fruits and leaves. Quercetin should be part of any energy-boosting protocol. You can get it by eating a few daily servings of quercetin-rich fruits and vegetables.
See also :

• Flavonoids
• Rutin

Food Sources

Quercetin occurs naturally in many foods. You can find it in good amounts in simple, everyday apples. But it’s also found in:

• Black Tea
• Guava leaves
• Broccoli
• Capers
• Cherries
• Citrus fruit
• Cranberries
• Leafy green vegetables
• Onions
• Raspberries
• Red grapes
• Red onions
• Tomatoes
• Honey

Special Precautions of Quercetin

Quercetin inhibits an important enzyme (CYP3A4) involved in the metabolism of many common medications, which can alter blood levels and effects of the drugs. It’s well known that grapefruit (which contains quercetin) can cause such interactions. This could be especially risky for people taking digoxin (for the heart). So if you take medication, check with your doctor or pharmacist about possible interactions with quercetin.

The benefits of Quercetin are

• anti-inflammatory properties
• it has antiviral effects. If patients have open wounds, whether they are aseptic or sterile, virus can easily enter the body, causing several complications.
• Influenza : Quercetin as an Antiviral Agent Inhibits Influenza A Virus (IAV).
• it has antiproliferative effects together with antifibrotic and antihistaminic effects. This property reduces the tendency to develop hypertrophic scars on the surgical wounds of the patient.
• boosts energy (athletes) : The evidence has been mixed. In small studies done at Appalachian State University in North Carolina, high doses of quercetin reduced colds and boosted alertness in athletes. But, the researchers said, the claims made specifically for FRS are based more on speculation than on science. Only one study on the actual product has been published. It found that two cans of FRS a day for six weeks improved performance in a small group of elite cyclists—though a formulation without quercetin resulted in some improvements, too.
• boosts the immune system.
• fuels the cells that power your muscles and brain.
• boosts brain power
• it helps maintain all-around good health
• Allergies : Quercetin is a natural antihistamine.
• Cancer : The combination of kaempferol and quercetin (another flavonoid) plays vital role in the suppression of cancer cells. Because of their anti-cancer activities, kaempferol & quercetin are used in anti-cancer drugs. This dietary flavonoid shows promising evidence in treating breast cancer, leukemia, lung cancer, neuroblastoma, and colon cancer.
• Varicose Veins and Hemorrhoids : may help improve vein strength.

References

www.mdpi.com/1999-4915/8/1/6