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Quercetin Supplement

$ 24.95

Quercetin offers powerful antioxidant support, promoting overall wellness and immunity while enhancing absorption with Bromelain.
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Description

Quercetin is a flavonol polyphenol found naturally in onions, apples, capers, and other plant foods, and it is one of the most studied bioflavonoids in the immune and antioxidant wellness category. What makes it particularly relevant for those building a daily wellness routine is its well-researched profile.

Quercetin supports antioxidant activity through direct free radical scavenging and supports overall immune balance as part of a consistent daily routine.* It has also been studied for its relationship to zinc transport, which is why pairing it with a zinc supplement supports a more complete immune wellness routine than either ingredient alone.* Double Wood's formula delivers 1,000mg of quercetin plus 200mg of bromelain per 2-capsule serving.

Bromelain is a pineapple-derived enzyme commonly paired with quercetin to support its bioavailability, quercetin alone has limited absorption. Every batch tested. Third-party tests by ISO/IEC 17025 accredited labs. COAs published openly. For a more complete immune and cellular wellness routine, Quercetin pairs well with Zinc, and with Phosphatidylserine for those who want both cellular health support and cognitive stress resilience in their daily regimen.*

Benefits
  • 1,000mg quercetin plus 200mg bromelain per serving. Bromelain is included to support quercetin's bioavailability, commonly used in research settings*
  • Supports antioxidant activity, immune balance, and cellular health as part of a consistent daily wellness routine*
  • Quercetin has been studied for its role in supporting zinc transport into cells, making it a natural complement to a zinc supplement for a more complete immune support routine*
  • Studied for its antioxidant activity across a broad body of flavonoid research*
  • Every batch tested. Third-party tests by ISO/IEC 17025 accredited labs. COAs published openly.

Directions & Dosage

Take 2 capsules (1,000mg quercetin, 200mg bromelain) daily with food. Can be taken all at once or split across two meals. Consistent daily use is recommended for ongoing antioxidant and immune support. If taking alongside a zinc supplement, take both at the same mealtime.

The Science Behind Quercetin Dihydrate (from Sophora japonica flower bud) with Bromelain

Antioxidant and immune mechanisms. Quercetin's antioxidant activity is rooted in its polyphenolic structure, which allows it to donate electrons to stabilize free radicals and support cellular health against oxidative stress. Quercetin has also been studied for its broader role in immune balance, one area of ongoing research interest. A review by Mlcek et al. published in Molecules (2016) documented quercetin's antioxidant and immune-related properties across multiple research contexts.*

The zinc ionophore connection. Zinc and quercetin. Quercetin has been studied for its relationship to zinc transport, which is part of why taking quercetin alongside a zinc supplement is a natural pairing for immune wellness support.* This is part of the research basis for the Quercetin plus Zinc pairing and why the combination has become a common choice in immune support routines.

Bromelain and bioavailability. Quercetin's bioavailability from oral supplementation is limited by its poor water solubility and rapid intestinal metabolism. Bromelain, a proteolytic enzyme from pineapple, is commonly paired with quercetin in an effort to support absorption in the gastrointestinal tract, and this combination has become a widely used approach in the supplement category.

View Latest Test Results

Third-party tested for quality and purity

This production lot was tested for quercetin and bromelain content, capsule weight, disintegration, heavy metals, and microbial quality.

Test Claim or Limit Result
Potency
Quercetin 900-1250 mg 955 mg
Bromelain 200 mg 200 mg
Physical Testing
Capsule Weight 773-855 mg 814 mg
Disintegration NMT 30 Minutes Passed
Heavy Metals
Arsenic (As) ICP<10 µg/serving 0.047 µg/serving
Cadmium (Cd) ICP<4.1 µg/serving 0.016 µg/serving
Lead (Pb) ICP<0.5 µg/serving 0.011 µg/serving
Mercury (Hg) ICP<2.0 µg/serving <0.023 µg/serving
Microbial Testing
Total Plate Count (cfu/g) <10,000 cfu/g 20 cfu/g
Total Yeast & Mold Count (Y&M) <1000 cfu/g <10 cfu/g
E.Coli Absent Absent
Salmonella spp. Absent Absent
Staphylococcus aureus Absent Absent

Lot: 2431200Manufactured: 01/2025

Lab: Brand Nutraceuticals, Inc.

View Certificate of Analysis (PDF)

See the original Certificate of Analysis for complete testing details, methods, and laboratory documentation.
View Certificate of Analysis View Third Party Test Results
Identity, potency, and contaminants verified per batch Identity, potency, and contaminants verified per batch
Manufactured in an FDA-registered cGMP facility Manufactured in an FDA-registered cGMP facility
Manufactured in the USA from Globally Sourced Materials Manufactured in the USA from Globally Sourced Materials

Benefits

  • Supports Immune System Health: Double Wood Supplements' Quercetin with Bromelain Capsules are made from plant flavonoids that are found in a variety of fruits and vegetables. Our Quercetin with Bromelain Capsules may help support your immune system
  • Includes 200 MG Bromelain - Bromelain helps improve the absorption of quercetin into the blood stream and works in synergy with Quercetin (increases Quercetin's bioavailability)
  • Ampk Metabolic Activator - Multiple studies have shown Quercetin may be considered an AMPK Activator and help support metabolism
  • Zinc Ionophore - Quercetin is a potent anti oxidant and zinc ionophore that may help support the immune system
  • 2 Month Supply - We include enough Quercetin and Bromelain to provide 60 servings of 1,000mg Quercetin and 200mg Bromelain
Benefits

Quercetin Dihydrate (from Sophora japonica flower bud) with Bromelain

Each 2-capsule serving delivers 1,000mg of quercetin dihydrate alongside 200mg of bromelain from pineapple stem. Bromelain is included to support quercetin's absorption in the gastrointestinal tract.* Every batch tested. Third-party tests by ISO/IEC 17025 accredited labs. COAs published openly.

Quercetin Dihydrate (from Sophora japonica flower bud) with Bromelain

What Customers Are Saying

Reviews

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"Always fast shipping and great selection no matter what you’re looking for."

Aaron B.

"Double Wood is always my go-to for supplements. Great, effective, clean products and always at a reasonable price."

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Supplement Facts

Pairs well with

Powerful alone, stronger together. Quercetin Supplement delivers targeted support on its own, but combining it with complementary ingredients can help create a more holistic and balanced approach to wellness.

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Frequently Asked Questions

What makes quercetin one of the most researched bioflavonoids for immune support?

Quercetin has accumulated one of the broader research profiles of any plant polyphenol in the immune and antioxidant category. Its mechanisms include direct antioxidant activity and studied effects on zinc transport, making it relevant across multiple dimensions of immune and cellular wellness. It also has a long history of use in traditional plant medicine across cultures, which has driven consistent modern scientific interest. The combination of traditional use and modern mechanistic research is what gives quercetin its credibility as a serious daily supplement.*

Why is bromelain included and does it make a meaningful difference?

Quercetin alone has limited bioavailability due to poor water solubility and rapid intestinal metabolism. Bromelain is a proteolytic enzyme from pineapple stem that has been studied for its role in supporting quercetin's absorption in the gastrointestinal tract.* The combination is a commonly used approach in research on quercetin supplementation and is why Double Wood's formula includes 200mg of bromelain alongside 1,000mg of quercetin rather than offering quercetin alone.

What is quercetin's relationship to zinc and why does it matter?

Quercetin has been studied for its role in supporting zinc transport across cell membranes.* This is part of why taking quercetin alongside a zinc supplement is commonly used as a more complete immune support routine. This is one of the more studied pairings in the immune supplement category.

When should I take quercetin and how should I time it?

Take 2 capsules daily with food. Quercetin can be taken all at once with a meal or split across morning and evening meals. If taking alongside a zinc supplement, take both at the same time. Consistent daily use over weeks supports steady antioxidant and immune balance rather than an acute response.*

What supplements pair best with quercetin?

Zinc is the most well-documented complementary pairing. Quercetin has been studied for its relationship to zinc transport, and zinc provides foundational immune nutrition, together forming a more complete daily immune support routine than either alone.* Phosphatidylserine is a well-suited pairing for those building a daily wellness routine that addresses both cellular health support and cognitive stress support. Serrapeptase is another option for those focused on tissue comfort and overall wellness, with quercetin providing cellular health support alongside serrapeptase's tissue wellness support.

Is quercetin well tolerated for long-term daily use?

Quercetin is generally well tolerated when used as directed at the 1,000mg daily serving. It has been used in clinical research trials lasting 4 to 12 weeks with no significant safety concerns at this dose. Those with pineapple allergies should note that the bromelain in this formula is pineapple-derived and should consult their healthcare provider before use. Quercetin may also interact with alcohol, allopurinol, and iron supplements, so those taking allopurinol or iron supplements, or who consume alcohol regularly, should consult their healthcare provider. Those taking blood-thinning medications should also consult their provider, as bromelain may have mild blood-thinning properties at higher doses

Is Double Wood Quercetin tested and what does the COA confirm?

Every batch tested for purity, potency, heavy metals, and microbial safety. Third-party tests by ISO/IEC 17025 accredited labs. COAs published openly. The COA confirms quercetin and bromelain content per serving, identity verification against reference standards, four heavy metals by ICP-MS below USP limits, and a full microbial panel including E. coli, Salmonella, and Staphylococcus aureus. The COA includes the lot number for your specific bottle.

Overall rating: 4.935185 / 5 from 216 reviews.

AI Generated Review Summary

Quercetin Supplement is highly recommended for supporting a strong immune system and healthy cholesterol. Customers praise its great value, quality, and fast shipping. The supplement is also noted for its affordability and non-GMO, vegan formulation.

Summary topics

  • Immune System Support (4%): It was noted by customers that the Quercetin Supplement is highly recommended for a strong immune system.
  • Customer Service Experience (5%): Customers keep praising the great service and customer service provided by Quercetin and Bromelain.
  • Shipping Speed (6%): Customers appreciated the fast shipping and quick delivery of the product, which was mentioned multiple times in the reviews.
  • Value for Money (8%): Customers keep praising the great value of the product, with multiple reviews emphasizing its affordability and value for money.
  • Product Quality (10%): Customers raved about the great quality of the product, with multiple mentions of excellent and high quality.

Review topics: [feeling, packaging, quality, issues, value, results, dose, shipping, body, price, supplement, quercetin, wood, service, order, deal, inflammation, offers, difference].

Review highlights

  • "A Great product at a great price and Quercetin works perfectly into our regimen to keep our immune systems strong!" — Beth
  • "we feel that the quercetin we received is a high quality product for a very reasonable price." — Anonymous
  • "Great quality supplements, quercetin is a necessity these days for better immunity protection." — John

Reviews

"Working great so far"

— Mario (5/5)

"Seems to work well for me."

— Terry (5/5)

"Good products with very fast delivery!"

— Sue (5/5)

If you want to stay

"If you want to stay well throughout the year this is product for it. I take it every day. Haven't been sick with anything at all. I have been taking it now over 6 yrs."

— Lois C. (5/5)

I have been taking quercetin

"I have been taking quercetin for 5 years. I am rarely sick. I think I picked up a cold during the holiday, but I can’t be sure because it never developed. A light cough and some phlegm. Best cold I ever had!!! I think quercetin is a miracle."

— Dorothy V. (5/5)

"Satisfied Customer"

— Bart (5/5)

Ever since I started taking this…

"Really makes my poop smellier!!"

— Sandra S. (4/5)

"This product helps me in my day to day life"

— Martha (5/5)

Great quality!

"First time taking this supplement from double wood! It’s very good 👍"

— Elisabete G. (5/5)

Everyone should be on this

"Been on for 4 years I never get sick. I ran out 2 months ago and I end up getting sick. Ordering supply now."

— Maddy (5/5)

Q&A

Are any of the plant flavanoids in your quercetin from onions?
Thank you for reaching out with your question! For faster assistance with product-related inquiries, we recommend contacting our customer service team directly at hello@doublewoodsupplements.com. Our team will be happy to provide the information or support you need.
What time of day is best to take this?
Taking quercetin with meals and preferably in the morning or early afternoon can help maximize its benefits. However, always follow any specific dosing instructions on your supplement label or from your healthcare provider.
Need to see exact ingredient label or no sale
This information can be found in the supplement fact panel on the back of our bottle or on our website. All of our products also third party tested and come with a COA which is also attached to each product on our website

Quercetin Supplement

From

$ 24.95

Primary Benefit

Immune Health

Other Benefits

Antioxidants

Product Form

Capsule
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