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Quercetin (90 Capsules)

  • $25.00
In stock (81157 items available)

Quercetin belongs to a class of antioxidants called flavonoids that give fruits and vegetables their bright colors. Flavonoids support capillary wall stability and healthy collagen development, balance immune response, and provide cardiovascular protection by reducing the oxidation of LDL cholesterol.

Quercetin has been shown to inhibit the release of histamine and other immune mediators which are thought to play a part in some IC/PBS, nonbacterial prostatitis patients’ symptoms, especially those with a history of allergies, migraines and irritable bowel syndrome (IBS).




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  • Weight
    0.19 lbs
  • SKU
    3203V

Quercetin belongs to a class of antioxidants called flavonoids that give fruits and vegetables their bright colors. Flavonoids support capillary wall stability and healthy collagen development, balance immune response, and provide cardiovascular protection by reducing the oxidation of LDL cholesterol.

Because IC/PBS patients tend to avoid many of the foods that contain flavonoids due to their high acid levels, it is recommended to supplement a healthy portion of these fruits and vegetables with quercetin instead which is less likely to cause urinary or stomach distress.

Mast cells have been found to be raised in patients suffering from IC. As a result, IC bladders also contain about double as much histamine as a healthy bladder. Histamine plays a role in inflammation. Quercetin has been shown to inhibit the release of histamines and other immune mediators which are thought to play a part in some IC/PBS and nonbacterial prostatitis patients’ symptoms including nocturia, daytime frequency, pain, burning, pressure, and pain with sex, especially in those with a history of allergies, migraines and irritable bowel syndrome (IBS).

Quercetin also decreases production of the COX-1 and COX-2 enzymes that cause systemic inflammation. It has been shown in studies to be an anti-inflammatory agent.

Quercetin is the anti-histamine component in Cysta-Q (Farr Laboratories) and CystoProtek (Algonot), both studied for IC/PBS with successful results.




10% OFF when you buy 4 to 11 Desert Harvest products
15% OFF when you buy 12 or more Desert Harvest products

* excludes Aloe Vera 180 capsules

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  • Storage
    Store in cool, dry place after opening. Does not need to be refrigerated.
  • Disclaimer
    Do not use if safety seal is broken or missing on supplements, or cap is not locked on skin care products. Discontinue use if irritation occurs. Consult your healthcare provider before using if you are pregnant.
  • Volume Discounts
    10% OFF when you buy 4 to 11 Desert Harvest products
    15% OFF when you buy 12 or more Desert Harvest products
    Excludes Super-Strength 180 and New Customer Special
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  • Directions for Use
    As a dietary supplement, take two capsules twice a day with meals or as directed by a qualified healthcare provider.
  • Ingredients
    Each serving (2 capsules) contains 500 mg of Quercetin (from the saphora plant), 100 mg of organic aloe vera powder, and 3 mg of silicon dioxide as a drying agent (a naturally occurring earth mineral).
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