Quercetin has antioxidant and anti-inflammatory effects that might help reduce swelling, kill cancer cells, control blood sugar, and help prevent heart disease Quercetin is most commonly used for conditions of the heart and blood vessels and to prevent cancer.
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.
What are the side effects of quercetin?
Common side effects of quercetin include: 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).
Is quercetin a good supplement to take?
Quercetin is found in many fruits and vegetables and is safe to consume. As a supplement, it appears to be generally safe with little to no side effects In some instances, taking more than 1,000 mg of quercetin per day may cause mild symptoms like headaches, stomach aches, or tingling sensations ( 48 ).
Does quercetin help inflammation?
One of the most important Quercetin benefits is its ability to help reduce inflammation in your body Research has shown that Quercetin has powerful anti-inflammatory and antioxidant effects. These effects are beneficial for anybody looking to boost their general health and well-being.
Is quercetin the same as coq10?
Just like quercetin, CoQ 10 showed antioxidant effects in our study on human nasal mucosal cells OTMs were reduced significantly by both concentrations used after cells were stressed by oxidants. No significant difference was found between the two concentrations (1 μM and 10 μM).
Does quercetin boost 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.
Is it safe to take quercetin daily?
When taken by mouth: Quercetin is possibly safe for most people when used short-term Quercetin has been safely used in doses up to 1 gram daily for 12 weeks. It’s not known if long-term use or higher doses are safe.
Can quercetin cause liver damage?
Quercetin as a nutritional supplement is well tolerated and has not been linked to serum enzyme elevations or to episodes of clinically apparent liver injury.
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 . 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.
Should quercetin be taken on an empty stomach?
Quercetin can have mild side effects like an upset stomach or headache, particularly if you take it on an empty stomach If you take prescription medication, consult with your doctor before adding quercetin to your regimen, as drug interactions can cause additional side effects.
Does quercetin affect sleep?
In contrast, the increase in non-REM sleep induced by quercetin was not affected by i.c.v. injection of bicuculline. Therefore, the present results suggest that quercetin alters the sleep-wake cycle partly through activation of GABA(A) receptors.
Does quercetin cause weight gain?
Quercetin was supposed to be an activator of oxidative metabolism  and it also may inhibit adipogenesis . But taken together, our data show that quercetin is not able to decrease either weight gain or feed efficiency as hypothesized, because no differences were found between placebo and the quercetin group.
What is the best form of quercetin to take?
The optimal effective dose of quercetin reported to have beneficial effect of lowering blood pressure and inflammation is 500 mg of the aglycone form.
Does quercetin interact with medications?
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. There don’t appear to be interactions between quercetin and foods or other herbs and supplements.
Is quercetin an antiviral?
Quercetin displays a broad range of antiviral properties which can interfere at multiple steps of pathogen virulence -virus entry, virus replication, protein assembly- and that these therapeutic effects can be augmented by the co-administration of vitamin C.
What are the health benefits of NAC?
NAC helps to replenish glutathione levels in the body. It also aids in regulating glutamate These functions may help to improve brain health and benefit people with conditions such as Alzheimer’s and Parkinson’s diseases. NAC may help with psychiatric disorders and addictive behaviors.
Is quercetin good for thyroid?
Quercetin acts as a rat thyroid disruptor with anti-thyroid properties both in vitro and in vivo Quercetin decreases the expression of the thyroid-restricted genes, NIS, TSHR, TPO and TG in FRTL-5 thyroid cells.
Does quercetin lower blood pressure?
The quercetin-induced lowering of systolic blood pressure observed in stage 1 hypertensive subjects (27.2 mm Hg) is clinically relevant because reductions of this magnitude are associated with a decrease in mortality of ;14% from stroke and ;9% from coronary heart disease (40).
Does quercetin help with hair loss?
For example, when combined with a commonly prescribed medication to treat hair loss, quercetin was shown to decrease DHT production in rats ( 17 ).
Does quercetin help with itching?
Indeed, quercetin is able to reduce redness, itching, and inflammation of damaged skin ; it may also help restore skin barrier function, increasing hydration, and reducing water loss.
How much quercetin is in an apple?
An average sized apple contains about 4.4 milligrams of quercetin for every 100 grams of apple Therefore, a medium-sized apple of roughly 150 grams may contain up to about 10 milligrams of quercetin, which is a fairly significant dose.
How long does quercetin stay in your system?
Human subjects can absorb significant amounts of quercetin from food or supplements, and elimination is quite slow, with a reported half-life ranging from 11 to 28 h . The average terminal half-life of quercetin is 3.5 h .