Pure Quercetin

• Quercetin is well-studied bioflavonoid that works synergistically with other flavonoids to provide strong antioxidant and anti-inflammatory support.
• partiQlar Pure Quercetin capsules provide 500 mg of high-purity quercetin in a single-ingredient formulation, free from additives or fillers.

Free US delivery from $50

Made in US

60 days money-back guarantee

Vegan

Good Manufacturing Practice

Free US delivery from $50

Made in US

60 days money-back guarantee

Vegan

Good Manufacturing Practice

HOW IT WORKS

What is Quercetin?

Think of quercetin as your body’s personal defense assistant. It’s a plant compound known for its strong antioxidant and anti-inflammatory benefits. This helps your body defend against triggers like dust and other environmental factors that can cause sneezing and congestion, making it popular for managing seasonal allergies.

Quercetin is also a team player—it boosts the effects of other supplements like vitamin C. Together, they reduce inflammation and protect your cells from damage caused by free radicals—unstable molecules that build up from stress, poor diet, or pollution.

quercetin supplements bottle in hand

Senolytic Effects

Quercetin acts as a senolytic agent, meaning it helps eliminate senescent cells—damaged cells that no longer function properly and contribute to aging and age-related diseases. Studies have shown that removing these cells can improve healthspan and potentially extend lifespan by reducing inflammation and cellular dysfunction¹​.

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Reduces Inflammation

Quercetin’s anti-inflammatory properties help inhibit the production of inflammatory cytokines and enzymes. This makes it effective in reducing inflammation in conditions like arthritis and asthma². It has also been shown to reduce markers of inflammation, such as C-reactive protein (CRP), making it a useful supplement for managing chronic inflammatory conditions

Allergy Relief

Quercetin acts as a natural antihistamine by stabilizing cells that release histamine, the chemical responsible for allergy symptoms like sneezing and congestion. Studies have demonstrated its effectiveness in reducing both immediate and late-phase allergic responses³, making it beneficial for people suffering from seasonal allergies

Neuroprotective Effects

Quercetin has shown promise in protecting brain health by reducing oxidative stress and inflammation. It activates pathways like AMPK, which help maintain cellular energy balance and reduce neuroinflammation, potentially slowing the progression of neurodegenerative diseases such as Alzheimer’s and Parkinson’s​

Supports Cardiovascular Health

Quercetin has been shown to help lower blood pressure and improve cholesterol levels, which are key factors in cardiovascular health. Studies indicate that quercetin may reduce systolic and diastolic blood pressure, particularly in individuals with hypertension. It also helps improve endothelial function, which is crucial for maintaining healthy blood vessels and reducing the risk of heart disease​

Antioxidant Properties

Quercetin neutralizes free radicals—unstable molecules that can damage cells and accelerate aging. By scavenging these molecules, quercetin protects cellular structures and promotes overall health. This antioxidant effect also helps lower the risk of chronic diseases linked to oxidative stress, such as heart disease and neurodegenerative disorders

HOW TO TAKE

Quercetin Dosage

Research suggests taking 500 to 1,000 mg of quercetin daily, split into two doses. For general support, 500 mg is common, while up to 1,000 mg is often used for specific needs like reducing inflammation or managing blood pressure. For seasonal allergies, start with one capsule daily and increase to two if needed. Begin supplementation a few weeks before allergy season for the best results.

Quercetin is best taken with meals that contain healthy fats to improve absorption. Taking it consistently, whether for general wellness or specific health concerns, ensures you get the most benefit.

WHY partiQlar?

  • Purity
  • Source
  • Quality
  • 3rd Party Testing
  • GMP Certifield Production Facilities
  • FDA Registered Production Facilities
  • NON GMO
  • Vegan

partiQlar Pure Quercetin

  • 500mg dosage
  • Leading source supplier Effepharm
  • Effepharm & partiQlar strictly follows USP and FDA guideline to ensure 100% quality
  • Third-party tested for purity & label claim

Other Brands

  • Unknown potency. Some completely fraudulent and 0% pure
  • Unknown source
  • Questionable quality standards
  • No third-party test
  • Purity
  • Source
  • Quality
  • 3rd Party Testing
  • GMP Certifield Facilities
  • FDA Registered Facilities
  • NON GMO
  • Vegan

partiQlar Pure Quercetin

  • 500mg dosage
  • Effepharm
  • USP and FDA guideline
  • 3rd party tested

Other Brands

  • Unknown potency
  • Unknown source
  • Low quality standards
  • Not verifield

QUALITY

Facts

Highest Purity: partiQlar’s Pure Quercetin is free from unnecessary fillers and additives. Our formulation contains only pure, active ingredients for maximum potency.

Single-Ingredient Formulation: supported by scientific research, Pure Quercetin provides an effective 500 mg dosage, ensuring maximum potency and flexibility.

Third-Party Tested: each batch undergoes rigorous third-party testing for purity and potency, ensuring transparency and reliability.

Sourced from a reputable and certified supplier, it is manufactured in a facility registered with the US FDA and NSF, adhering to stringent regulatory standards for safety and quality assurance.

partiQlar Quercetin supplement facts bottle

We Want You to Ask Questions

Seriously, our team of supplement experts and scientists has answers

PartiQlar’s Pure Quercetin is formulated with the highest quality ingredients. Our single-ingredient formulation ensures maximum potency and flexibility, without unnecessary fillers or additives. Each batch is third-party tested for purity, potency, and safety, providing a reliable and effective supplement.


PartiQlar’s Pure Quercetin is formulated with the highest quality ingredients. Our single-ingredient formulation ensures maximum potency and flexibility, without unnecessary fillers or additives. Each batch is third-party tested for purity, potency, and safety, providing a reliable and effective supplement.


While animal studies suggested that quercetin could enhance endurance and physical performance, human studies have shown mixed results. Research indicates that quercetin does not significantly improve athletic performance in humans, particularly in untrained individuals. Its primary benefits seem to be related more to recovery and reducing exercise-induced inflammation rather than enhancing performance directly.

Yes, Quercetin has natural antihistamine properties that can help alleviate symptoms of seasonal allergies, such as sneezing, itching, and congestion. By stabilizing mast cells and reducing histamine release, Quercetin can provide relief from allergic reactions.

Yes, Quercetin and Vitamin C are often taken together as they can work synergistically. Vitamin C may enhance the absorption of Quercetin and amplify its antioxidant effects, providing additional immune support and anti-inflammatory benefits.

While Quercetin has anti-inflammatory and immune-supporting properties, there is currently no conclusive evidence that it can prevent or treat COVID-19. It may support overall immune health, but it should not be used as a substitute for vaccines or other proven treatments. Always follow public health guidelines and consult with a healthcare provider.


Yes, Quercetin is generally safe for daily use when taken at recommended dosages. Consistent daily supplementation can support immune function, reduce inflammation, and promote overall health. It’s always best to consult with a healthcare provider to determine the appropriate daily dose for your specific needs.

Quercetin is generally well-tolerated, but some individuals may experience mild side effects such as headaches, digestive discomfort, or tingling sensations. Taking Quercetin with food can help minimize these effects. If you experience any adverse reactions, consult with a healthcare provider.


Real People. Real Results

Discover the honest feedback and join our thriving community to experience the benefits firsthand

4.5 out of 5.0 stars

Transparency you can trust. Discover what partiQlar users are saying.

Perfect supplement! Best brand.

September 17, 2024

I started using quercetin about three months ago to see if it could help with my immune health. I work in a busy environment, and I tend to catch colds more often than I’d like. Since taking quercetin daily, I’ve noticed I’m not falling ill as frequently. It’s like my body is better prepared to fight off the usual bugs. I also read it’s good for managing allergies, and while I don’t have major issues, I do feel like my sinuses are clearer.

James Porter

Works so well for my overal-being

July 31, 2024

I’ve tried quercetin from different brands, but PartiQlar’s is by far the best. It’s easy to swallow, and I’ve noticed better results with this one.

Sarah Collins

Good product

April 14, 2024

Tried this for seasonal allergies. Can’t say it’s been a total game-changer, but I’ve noticed a slight improvement in symptoms

Patricia B. Murphy

I feel like a change has occurred after just one week. Awesome!

April 12, 2024

I feel like a change has occurred after just one week. Awesome!

Timothy D.

Thank you so much PartiQlar

April 2, 2024

Thank you so much PartiQlar for being the best priced, the best products because they have the highest amount of mg, the fact that the products are 3rd party tested, and always, Always packaged in a manner my products are not damaged. Thank you so much PartiQlar!

Rebecca P
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