Quercetin is the most abundant dietary flavonoid. It's been linked to improved exercise performance and reduced inflammation, blood pressure, and blood sugar levels. Plus, it may have brain-protective, anti-allergy, and anticancer properties. Though its benefits seem promising, more human research is needed.

What are the benefits of taking quercetin?

• Fighting free radicals. Quercetin has antioxidant properties. ...
• Reducing inflammation. ...
• Reducing the risk of cancer. ...
• Preventing neurological diseases. ...
• Relieving allergy symptoms. ...
• Preventing infections. ...
• Reducing the risk of heart disease. ...
• Lowering high blood pressure.

Who should not take quercetin?

You should take periodic breaks from taking quercetin. Pregnant women, breastfeeding women, and people with kidney disease should avoid quercetin. At doses greater than 1 g per day, there have been reports of damage to the kidneys.

Is it safe to take quercetin daily?

Quercetin is POSSIBLY SAFE for most people when taken by mouth short-term. Quercetin has been safely used in amounts up to 500 mg twice daily for 12 weeks. It is not known if longer-term use or larger amounts are safe. Quercetin can cause headache and tingling of the arms and legs.

What are the side effects of quercetin?

• Headache (oral use)
• Numbness and tingling (oral use)
• Shortness of breath (intravenous use)
• Nausea and vomiting (intravenous use)
• Kidney damage (intravenous use greater than 945 mg/m2)

The health benefits of Quercetin

What medications should not be taken with quercetin?

Interactions. Be careful if you are taking drugs such as antibiotics, cyclosporine, warfarin, or drugs that are changed by the liver. Quercetin may change how these drugs work and raise the risk of side effects.

Does quercetin make you gain weight?

This means that, while reducing inflammation, quercetin helps to efficiently burn sugar and fats to curb weight gain. Yet another important study showed that quercetin has a direct anti-obesity effect.

Does quercetin affect sleep?

In summary, this investigation demonstrated that 6 weeks of supplementation with 1 g/day quercetin did not affect energy, fatigue, or sleep quality in moderately trained men and women.

Is quercetin an antiviral?

Quercetin has been studied in various types and models of viral infection due to its promising antiviral effects in inhibiting polymerases (12), proteases (13), reverse transcriptase (14), suppressing DNA gyrase, and binding viral capsid proteins (15, 16).

What does zinc do for the body?

Zinc, a nutrient found throughout your body, helps your immune system and metabolism function. Zinc is also important to wound healing and your sense of taste and smell. With a varied diet, your body usually gets enough zinc. Food sources of zinc include chicken, red meat and fortified breakfast cereals.

Is CoQ10 a quercetin?

Antioxidants, such as coenzyme Q10 (CoQ10) and quercetin, a member of flavonoids present in red wine and tea, are thought to play a significant role in protecting cells from oxidative stress induced by reactive oxygen species (ROS).

Does quercetin make pee?

Maximum safe dosages for young children, nursing women, or people with serious liver or kidney disease have not been established. Evidence suggests that use of quercetin supplements can elevate urine and blood levels of the substance homovanillic acid.

What food has the most quercetin?

Quercetin is contained in abundance in apples, honey, raspberries, onions, red grapes, cherries, citrus fruits, and green leafy vegetables [2]. Among vegetables and fruits, quercetin content is highest in onions. The bulb color and type seems to be a determining factor for quercetin concentration in onions.

Is quercetin a good anti-inflammatory?

Quercetin was reported as a long lasting anti-inflammatory substance that possesses strong anti-inflammatory capacities [43,44]. It possesses anti-inflammatory potential that can be expressed on different cell types, both in animal and human models [45,46,47,48,49,50,51,52,53].

Does quercetin boost energy?

Recent studies have suggested that quercetin can boost endurance, increase VO2 max (ie aerobic capacity), fight fatigue, support the immune system and attenuate exercise-induced damage in the body, making it the perfect pill for athletes, or anyone who pushes their body to the limit.

Does quercetin increase energy?

Quercetin, a polyphenolic compound and a major bioflavonoid in the human diet, has anti-inflammatory properties and has been postulated to enhance energy expenditure (EE).

Is quercetin good for immune system?

Quercetin is known for its antioxidant activity in radical scavenging and anti-allergic properties characterized by stimulation of immune system, antiviral activity, inhibition of histamine release, decrease in pro-inflammatory cytokines, leukotrienes creation, and suppresses interleukin IL-4 production.

Does quercetin affect thyroid?

However, concerns have been raised about the potential toxic effects of excessive intake of quercetin, and several studies have demonstrated that flavonoids, included quercetin, can interfere with thyroid function. In a previous report, we showed that quercetin inhibits thyroid-cell growth and iodide uptake.

What is cytokine storm?

During a cytokine storm, various inflammatory cytokines are produced at a much higher rate than normal. This overproduction of cytokines causes positive feedback on other immune cells to occur, which allows for more immune cells to be recruited to the site of injury that can lead to organ damage.

Is quercetin good for anxiety?

Extensive research has shown that dietary intake or supplementation of the natural flavonoid quercetin might be useful for treating anxiety-related symptoms.

Does quercetin help depression?

Taken together, our study revealed that quercetin could alleviate LPS-induced depression like behaviors and impairment of learning and memory in rats, the mechanism of which might be partly associated with its ability in regulating the BDNF-related imbalance expression of Copine 6 and TREM1/2 in the hippocampus and PFC ...

What does quercetin with bromelain do?

"It donates electrons to free radicals, preventing inflammation and histamine development in the body," Shapiro says. Quercetin is popular as a supplement, often combined with other nutrients such as bromelain or vitamin C because it is not easily absorbed and used in the body on its own.

Is Quercetin good for arthritis?

demonstrated quercetin exerted anti-inflammatory, analgesic and antioxidant effects in experimental arthritis. In this study, we revealed that quercetin could suppress autoimmune arthritis by inhibiting the inflammatory activities of neutrophils.

Can you take quercetin if you are on a blood thinner?

If you are being treated with any of the following medications, you should not use quercetin supplements without first talking to your health care provider. Anticoagulants (blood thinners) -- Quercetin may enhance the effect of these drugs, increasing your risk for bleeding: Warfarin (Coumadin) Clopidogrel (Plavix)