Health Benefits of Quercetin
Quercetin Side Effects
All about the health benefits of quercetin...
What is it?
Quercetin is a type of flavonoid that serves as the backbone for many other members of the flavonoid family, including the citrus flavonoids rutin, quercitrin, and hesperidin. Flavonoids (or "bioflavonoids" as supplement manufacturers often label them) are plant pigments that give fruits, flowers, and vegetables much of their color.
Quercetin is primarily found in citrus fruits, apples, onions, parsley, tea, and red wine. There are thousands of different flavonoids, and flavonoids, such as quercetin provide many powerful health-promoting benefits.
The Health Benefits of Quercetin
One of the many health benefits of quercetin is that it acts as a potent antioxidant combating the destructive "free radical" molecules that play a part in many diseases.
Quercetin also has healthful anti-inflammatory and anti-allergy effects. It inhibits the production and release of histamine and other allergic/inflammatory mediators, making it of value for allergies, particularly allergies to pollen. It may also be helpful for hayfever, hives, sinusitis, asthma, and inflammation disorders.
Quercetin, along with other flavonoids, can also improve the health of capillaries. In addition, quercetin, along with other flavonoids, can improve the health of connective tissues. Therefore, the many health benefits of quercetin include alleviating bruising, edema, varicose veins, and fragile capillaries.
In test tube and animal studies quercetin has shown to have anti-cancer effects. In fact, flavonoids from fruits and vegetables have long been thought to be very important substances to possibly help prevent cancer.
One study suggests that quercetin is helpful for prostate health. More specifically, in a double-blind study quercetin was effective in non-bacterial chronic prostatitis (inflammation of the prostate gland).
Test tube, animal, and some population-based studies suggest that quercetin, resveratrol, and catechins -- all flavonoids -- reduce the risk of atherosclerosis. Atherosclerosis is a narrowing of the arteries from a buildup of fatty deposits called plaque that can lead to heart attack or stroke. However, studies in people are needed to confirm these findings.
Quercetin has also been shown to be a strong inhibitor of human lens aldose reductase – an enzyme that plays a part in the formation of diabetic cataract, neuropathy, and retinopathy.
Lastly, quercetin enhances the action of vitamin C, another antioxidant.
Benefits of Quercetin
Quercetin Side Effects and Precautions
Quercetin is considered safe. However, people who are sensitive to citrus and use quercetin in a formula containing vitamin C, or other citrus bioflavonoids might want to err with caution because some experts point out that some have reported mouth sores, headaches, and digestive upset.
It is recommended that you speak to a knowledgeable healthcare provider if you are on any type of medications or have a health condition before supplementation.
People on Hormone Replacement Therapy (HRT) should be aware that quercetin may increase estradiol and reduce the effectiveness of other forms of estrogen.
If you take the calcium channel blocker felodipine (high blood pressure), speak to a knowledgeable healthcare provider before taking quercetin supplements.
Again, to reap the health benefits of quercetin safely, always speak to a knowledgeable healthcare provider before taking supplements.
Tips on Choosing a Supplement
1. Select a supplement from a manufacturer that follows pharmaceutical GMP compliance, which is the highest standard possible. Put simply, pharmaceutical GMP compliance facilities adhere to the strictest regulatory standards for the manufacture of dietary supplements.
This is CRUCIAL because dietary supplements in the U.S. are unregulated. As such, purity and quality has been reported to be an issue. In fact, consumers only have a 1 in 5 chance of buying a product that actually contains the amount of ingredients stated on the label or one that is not contaminated.
2. Quercetin enhances the action of vitamin C and bromelain (a natural digestive enzyme found in fresh pineapple) enhances quercetin's absorption. Therefore, we believe you should consider combination products. For example, a product that contains quercetin, vitamin C, and bromelain, along with other prominent flavonoids such as hesperidin and rutin.
3. Select supplements that do not contain any fillers or additives like sugar, starch, gluten, silica (sand!) or any artificial colors or flavors.
4. Select a product from a highly credentialed formulator -- someone who is qualified to create a supplement with ingredients that work together synergistically in a perfect balance to offer the maximum results.
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