Fun Facts about Quercetin

Quercetin’s antihistamine properties may help you avoid a scar. You can find quercetin in many over-the-counter herbal products for scar treatment (e.g., Mederma®)—it’s in the onion extract ingredient.⁸⁴

Want to improve the absorption of quercetin? Take it with bromelain—a helpful enzyme that nutritionists suggest can do just that. You can even find supplements with quercetin and bromelain combined, such as Activated Quercetin™ from Source Naturals.^85-86

As a flavonoid, quercetin is a one of the pigment molecules responsible for the bright colors in fruits and vegetables.⁸⁵

Studies suggest that quercetin’s anti-inflammatory and antihistamine properties could reduce asthma attacks triggered by allergies just like it helps relive nasal allergies.⁸⁵

Tired of seasonal allergy symptoms? In one study, quercetin reduced histamine release in people with seasonal allergies by 96%. Take 500 mg/day of quercetin with 100 mg of bromelain and 500 mg of vitamin C for the best effect, or you can try Freeda®’s Anti-Allergy formula.⁸⁶

Got keloids? You might want to get some quercetin then. Studies show that it blocks insulin-like growth factor (IGF), a protein known to promote the excess collagen produced in keloids.⁸⁷

Quercetin-containing kudzu may be an invasive weed in Georgia, but it’s a medicinal herb in both China and Japan. Thought to reduce alcohol cravings, relieve headache and tinnitus, and lower blood pressure, you can find it in extract and supplement form at online and retail locations.⁸⁶

Antioxidant medicinal herbs used for supplements that contain quercetin include milk thistle, olive leaf, bilberry, elder, and green tea.⁸⁶

Reduce menopausal symptoms naturally with herbs that contain quercetin, such as licorice, primrose, Tribulus terrestris, and motherwort.⁸⁶

New studies suggest that quercetin can improve your mood. This might come as no surprise, since like many antidepressant and anti-anxiety drugs, quercetin is an MAO inhibitor.⁸⁸

Many popular herbs known to be effective for anxiety, depression, insomnia, and stress contain quercetin, such as St. John’s wort, hops, valerian, passionflower, chamomile, and gingko.⁸⁶

Herbs with antibacterial, antifungal, antiviral, and immune-boosting properties that can help you fight infections from these microbes often contain quercetin. Some of the more popular ones are: barberry, bilberry, cayenne, cranberry, echinacea, eucalyptus, garlic, licorice, olive leaf, and parsley.⁸⁶