Finding the best quercetin supplement for MCAS can feel overwhelming when your body reacts to almost everything. You’ve tried everything: antihistamines that leave you foggy, mast cell stabilizers that cause their own reactions, and supplements from well-meaning friends that sent you straight to the couch. When your immune system treats ordinary food like an emergency, even navigating the supplement aisle feels dangerous.
Quercetin keeps appearing in MCAS and histamine intolerance communities—and for good reason. Preclinical research shows it can inhibit mast cell degranulation, reduce inflammatory cytokine release, and block some of the same pathways as pharmaceutical stabilizers. Most of this evidence comes from laboratory and small human studies rather than large MCAS-specific trials.
That said, it’s not a cure, human MCAS-specific trials are limited, and it won’t work for everyone. This guide helps you figure out whether it’s worth trying, which form to choose, and what to watch for if you’re symptom-sensitive.
Who benefits most: People with mild-to-moderate histamine intolerance or MCAS who have already addressed obvious dietary triggers and are looking for additional support. Quercetin works best as one piece of a larger management strategy—not as a standalone fix. Most readers see the best results when supplementation is paired with a well-structured low-histamine food strategy.
If you want the short answer first, the quick picks below highlight the quercetin supplements most often tolerated by sensitive users. Below, we break down how to choose the best quercetin supplement for MCAS based on sensitivity level, formulation, and real-world tolerability.
Quick Picks Summary
Not every histamine-sensitive body responds the same way to quercetin. Choosing the best quercetin supplement for MCAS depends largely on your reactivity level, excipient tolerance, and whether absorption or simplicity matters most.
Short answer: If you’re highly sensitive, start with Pure Encapsulations. If you want stronger absorption and already tolerate supplements well, Thorne Phytosome is usually the better next step.
All selections below were reviewed for excipient sensitivity and real-world tolerability in histamine-sensitive users.
Best Overall — Thorne Quercetin Phytosome
Best for: Most MCAS and histamine intolerance users who want enhanced absorption with a clean, practitioner-grade formula.
- Phytosome form with significantly improved bioavailability
- NSF Certified for Sport
- Minimal excipient profile
- 250 mg per capsule for flexible dosing
Best for Sensitive MCAS Users — Pure Encapsulations Quercetin
Best for: Highly reactive individuals who need the cleanest possible formula.
- Only essential inactive ingredients
- No unnecessary fillers or coatings
- 500 mg standard quercetin
- Widely used in sensitive patient populations
Best Liposomal Option — Rho Nutrition Liposomal Quercetin
Best for: People who react to capsules or need adjustable liquid dosing.
- Liposomal delivery for improved absorption potential
- Liquid format allows micro-titration
- Useful for capsule-sensitive users
- Flexible dosing approach
Best for Low-Dose Titration — Integrative Therapeutics EMIQ
Best for: Highly sensitive users who need predictable absorption at lower doses.
- Water-soluble quercetin form
- Smaller dose per capsule for careful titration
- Practitioner-trusted brand
- Suitable for gradual build-up protocols
What You’ll Learn
- Why quercetin form—phytosome, EMIQ, liposomal, or standard dihydrate—directly affects how much reaches your bloodstream and which to choose for your situation
- Which five products have the cleanest excipient profiles for MCAS and histamine-sensitive users, and the honest trade-offs of each
- The drug interactions (including warfarin and CYP2C9-metabolized medications) that make quercetin potentially unsafe for certain people
- How to start at micro-doses and titrate slowly without triggering a paradoxical mast cell flare
- A realistic look at onset timelines, dosage ranges by form, and how quercetin fits alongside DAO supplements
- When quercetin won’t be enough—including severe MCAS, non-histamine triggers, and gut-driven histamine excess
Comparison Table
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| Product | Form | Quercetin per Serving | Best For | Price Range | Price & Availability |
|---|---|---|---|---|---|
| Thorne Quercetin Phytosome | Phytosome capsule | 250 mg | Enhanced absorption | ~$38–52 / 60 caps | Check Details |
| Seeking Health HistaminX | Multi-ingredient capsule | 150 mg | Combo histamine support | ~$40–46 / 60 caps | Check Details |
| Pure Encapsulations Quercetin | Standard capsule | 500 mg | Excipient-sensitive users | ~$22–29 / 60 caps | Check Details |
| Integrative Therapeutics EMIQ | Water-soluble capsule | 33 mg | Low-dose titration | ~$26–33 / 60 caps | Check Details |
| Rho Nutrition Liposomal | Liquid liposomal | 200 mg | Capsule-sensitive users | ~$34–39 / bottle | Check Details |
Price ranges are approximate and may vary by retailer. Always verify current pricing before purchasing.
Tip: Highly sensitive readers often do best starting with the cleanest formula first, then moving to enhanced-absorption forms if needed.
How Quercetin Works for MCAS and Histamine Intolerance
Quercetin is a flavonoid—a plant pigment found in onions, apples, berries, and capers. As a supplement, it’s studied primarily for its effects on mast cells and inflammatory signaling.
Mast cell stabilization: Several preclinical studies show quercetin can inhibit mast cell degranulation—the process that releases histamine, tryptase, and other mediators into surrounding tissue. A 2012 PLoS One study by Weng et al. compared quercetin directly to cromolyn (disodium cromoglycate, a pharmaceutical mast cell stabilizer) in human cultured mast cells and found quercetin more effective at inhibiting IL-8 and TNF release. Quercetin also worked prophylactically, while cromolyn required simultaneous administration to be effective.[1] These are cell culture findings—they don’t directly translate to human clinical outcomes, but they support the mechanism.
Downstream anti-inflammatory effects: Quercetin appears to attenuate NF-κB and p38 MAPK activation—two central inflammatory signaling pathways. Research in HMC-1 human mast cells showed quercetin decreased gene expression of TNF-α, IL-1β, IL-6, and IL-8.[2] Again, this is preclinical data. It tells us how quercetin acts on isolated cells, not how it performs in people with complex conditions.
FcεRI receptor expression: A 2022 study in Molecules found quercetin reduced FcεRI (the high-affinity IgE receptor) expression in mouse mast cells, which could theoretically reduce IgE-mediated activation.[3] Whether this translates to meaningful clinical benefit in humans with MCAS isn’t yet established.
Non-IgE mast cell pathways: A 2024 study in Journal of Inflammation Research found quercetin can act as a CLM-1 agonist, inhibiting MRGPRX2-mediated mast cell degranulation—a non-IgE pathway increasingly recognized as relevant to MCAS.[4]
In humans: Direct MCAS trials don’t exist yet. A 2022 randomized, double-blind trial of quercetin supplementation in pollinosis (allergic rhinitis) showed improvement in nasal and ocular symptoms over 4 weeks.[6] That’s the closest we have to controlled human evidence for symptom relief in an allergic/mast cell-mediated condition.
Realistic onset expectations: Most practitioners using quercetin for histamine intolerance suggest 4–8 weeks of consistent use before assessing response. It’s not fast-acting in the way an antihistamine is—think of it as upstream support rather than acute relief.
How We Chose the Best Quercetin Supplements
MCAS and histamine intolerance require stricter supplement evaluation than most conditions. The wrong excipient can trigger a reaction before the quercetin even has a chance to work. Because people searching for the best quercetin supplement for MCAS often have unusually high supplement sensitivity, excipient screening and real-world tolerability were weighted heavily.
If you’re still early in your histamine journey, our histamine intolerance guide explains the root mechanisms in more detail.
We reviewed ingredient labels, manufacturing certifications, published pharmacokinetic data where available, and real-world tolerability patterns reported by histamine-sensitive users.
Bioavailability first: Standard quercetin dihydrate has notoriously poor oral bioavailability—typically under 2% absorbed. A pharmacokinetic study by Riva et al. found that Quercetin Phytosome (a lecithin-based formulation) produced substantially higher plasma concentrations than unformulated quercetin at equivalent doses.[5] Phytosome, EMIQ, and liposomal forms exist specifically to address this limitation.
Excipient scrutiny: Common fillers that cause reactions in sensitive patients include magnesium stearate (controversial), silicon dioxide, titanium dioxide, artificial colors, and certain flow agents. We prioritized formulas with the shortest, cleanest ingredient lists.
Quercetin form matters:
- Dihydrate (standard): Lowest cost, lower absorption, useful for sensitive users starting slow
- Phytosome: Lecithin-bound, significantly higher absorption, well-tolerated by most
- EMIQ (alpha-glycosyl isoquercitrin): Water-soluble glycoside form with good clinical evidence for allergy symptoms
- Liposomal: Fat-encapsulated, high theoretical absorption, limited human comparative data
Third-party testing: NSF, USP, or Informed Sport certification matters. For MCAS patients, the risk of supplement contamination triggering reactions is real.
Capsule vs. liquid: Some people with MCAS react to capsule coatings (HPMC, gelatin) or capsule-associated excipients. Liquid liposomal options avoid this entirely.
Individual Product Reviews
Thorne Quercetin Phytosome
Best for: Most MCAS and histamine intolerance patients looking for enhanced absorption with a trusted formulation
Thorne’s Quercetin Phytosome uses the same lecithin-complexed delivery system studied by Riva et al., providing substantially better oral absorption than standard quercetin.
Thorne is one of the more rigorously tested supplement brands available—their manufacturing standards are unusually high for the industry.
Pros:
- Phytosome complex for significantly improved bioavailability
- Minimal excipients: hypromellose (vegetarian capsule), microcrystalline cellulose
- NSF Certified for Sport—tested for contaminants
- No artificial colors, coatings, or unnecessary fillers
- 250mg per capsule allows easy dose adjustment
Cons:
- More expensive than standard quercetin options
- Lecithin base (soy- or sunflower-derived)—check source if soy-sensitive
- Some users report mild GI discomfort early on
Notes for histamine/MCAS sensitivity: The lecithin complex is generally well-tolerated. Start with half a capsule opened into food if you react easily to new supplements.
Practical usage tip: Take 20–30 minutes before the meal you expect to be highest in histamine-releasing foods.
Seeking Health HistaminX
Best for: People managing histamine intolerance who want quercetin alongside complementary co-factors in one capsule
HistaminX isn’t a pure quercetin supplement—it combines quercetin with vitamin C, stinging nettle leaf, and bromelain. This multi-ingredient approach aligns with how many practitioners recommend using quercetin (particularly the quercetin + bromelain combination, which may enhance quercetin absorption). However, it means you’re getting lower quercetin per capsule than standalone products.
Pros:
- Combines quercetin, bromelain, vitamin C, and nettle—multiple histamine-relevant mechanisms
- Bromelain included, which some research suggests improves quercetin bioavailability
- Seeking Health has a strong reputation in the MCAS/histamine community
- Vegetarian capsules, relatively clean formula
Cons:
- Multiple active ingredients complicate identifying what helps or triggers reactions
- Lower quercetin dose per capsule (250mg) than pure options
- Bromelain is derived from pineapple—a histamine liberator in some individuals
Notes for histamine/MCAS sensitivity: The multi-ingredient formula can make troubleshooting difficult. If you react, you won’t know which ingredient caused it. Consider a pure quercetin product first if you’re highly reactive.
Practical usage tip: Start with one capsule at a meal. Log your response for at least two weeks before adding other supplements.
Pure Encapsulations Quercetin
Best for: Excipient-sensitive patients who want a clean, single-ingredient quercetin with no surprises
Pure Encapsulations has built its reputation specifically on minimal-filler formulations designed for sensitive patients. Their quercetin contains quercetin dihydrate and a vegetarian capsule—that’s essentially it. The trade-off is standard bioavailability; you’re not getting the enhanced absorption of phytosome or liposomal forms.
Pros:
- Genuinely minimal excipients—among the cleanest formulations available
- 500mg per capsule (easy to take less by opening capsule)
- Vegetarian capsule, no titanium dioxide, no magnesium stearate
- Widely available, mid-range price point
- Good first-choice for testing tolerance
Cons:
- Standard quercetin dihydrate—lower and more variable absorption than enhanced forms
- May require higher doses to achieve equivalent effect compared to phytosome
- No third-party certification (though manufacturing standards are high)
Notes for histamine/MCAS sensitivity: This is the go-to recommendation for highly reactive patients. If you’re going to try quercetin for the first time, this is the safest place to start.
Practical usage tip: Open the capsule and mix a small amount (⅛ to ¼ dose) into applesauce or water. Build up over 2–3 weeks before reaching a full 500mg dose.
Integrative Therapeutics Alpha-Glycosyl Isoquercitrin (EMIQ)
Best for: Patients who need water-soluble, highly bioavailable quercetin at lower doses with a strong clinical track record
EMIQ (alpha-glycosyl isoquercitrin) is a water-soluble quercetin glycoside with a meaningfully different absorption profile than quercetin aglycone. Clinical research in pollinosis (allergic rhinitis) has used EMIQ specifically, providing more direct human evidence for this form. Doses are lower—typically 50mg—because absorption is more predictable.
Pros:
- Water-soluble form with predictable, reliable absorption
- Clinical trials in allergic rhinitis used this specific form
- Low per-dose quercetin amount suits people who need to titrate slowly
- Generally clean formulation from a professional-grade brand
Cons:
- Most expensive option per serving
- Lower absolute quercetin dose may be insufficient for some users
- Enzyme-modification process may concern some patients
- Less widely available than other options
Notes for histamine/MCAS sensitivity: The lower dose makes this appealing for highly reactive patients. The water-solubility may actually reduce GI tolerance issues some people experience with fat-soluble quercetin forms.
Practical usage tip: Take with a light meal. Given the lower dose, twice-daily dosing (morning and before dinner) is a reasonable approach.
Rho Nutrition Liposomal Quercetin
Best for: Patients who react to capsule coatings or need maximum absorption and are comfortable with a liquid format
Liposomal delivery encapsulates quercetin in phospholipid vesicles that theoretically improve absorption through intestinal cell membranes. The liquid format bypasses capsule excipient concerns entirely. Rho Nutrition’s product is among the cleaner liposomal quercetin options available.
Pros:
- Liquid format avoids capsule-related excipient reactions
- Liposomal encapsulation for enhanced bioavailability
- Dose is highly adjustable—start very small, build gradually
- No capsule coating reactions possible
Cons:
- Taste can be challenging for some users
- Most expensive per serving
- Comparative human data for liposomal vs. phytosome quercetin is limited
- Requires refrigeration after opening; shorter shelf life
Notes for histamine/MCAS sensitivity: Start with a very small amount (¼ of the labeled dose) mixed into a small amount of water. The liquid format is gentler for some patients but the taste requires adjustment.
Practical usage tip: Store in the refrigerator immediately on receipt. Mix into a small amount of room-temperature water, not cold, to improve palatability.
Quercetin Dosage for MCAS and Histamine Intolerance
There’s no established clinical dose specifically for MCAS, and individual tolerance varies considerably. These ranges reflect what’s been used in research and common clinical practice.
Standard quercetin (dihydrate): 500–1,000mg daily is commonly cited. Some practitioners use up to 1,500mg in divided doses. However, higher doses increase the risk of side effects and interactions—don’t start here.
Quercetin phytosome: 250–500mg daily, reflecting the improved absorption. The Riva et al. pharmacokinetic study used 250mg and 500mg doses.
EMIQ: 50–100mg daily is typical, owing to better absorption. Human allergy trials used 100–200mg quercetin equivalent doses.
Liposomal: Follow the product’s specific labeling; liposomal formulas vary significantly in concentration.
Starting slow for MCAS: Begin with 25–50mg quercetin equivalent (½ capsule of a low-dose product, or a few drops of liquid). Hold for 5–7 days. If tolerated, increase. The goal is to find the minimum effective dose, not to take as much as possible.
Timing: Most evidence suggests taking quercetin before meals—particularly before higher-histamine meals. Some practitioners recommend taking it 20–30 minutes before eating.
Divided doses: Splitting the daily dose (morning and evening meals) tends to produce more consistent serum levels than single daily dosing.
Individual tolerance varies widely. Some patients stabilize at 250mg phytosome. Others need 1,000mg standard quercetin. There’s no reliable way to predict your response in advance.
Quercetin Side Effects and Safety
Most people tolerate quercetin well at standard doses. That said, MCAS patients can react to almost anything, and this is no exception.
Common mild effects: Headache, GI discomfort, and nausea are occasionally reported, particularly at higher doses or when starting too quickly. These usually resolve with dose reduction.
Paradoxical MCAS reactions: Some patients experience a flare when starting quercetin. This isn’t common, but it happens. It’s more likely if you start with a high dose or a highly bioavailable form. Starting low and slow dramatically reduces this risk.
Medication interactions: Quercetin inhibits CYP2C9, an enzyme involved in metabolizing several drugs including warfarin. A case report by Patel et al. documented a significant INR elevation (7.5) in a patient on stable warfarin who started quercetin supplementation.[8] If you take warfarin or other anticoagulants, discuss quercetin with your prescriber before starting. A safety review by Andres et al. also flagged potential interactions with certain other medications metabolized by CYP enzymes.[7]
Kidney caution: Animal studies have suggested quercetin at very high doses may affect pre-damaged kidneys. People with existing kidney conditions should use caution and discuss with their physician. Supporting overall mineral balance can also matter for mast cell stability — our magnesium glycinate guide explains when it may be helpful.
Pregnancy and breastfeeding: Insufficient human safety data exists. Avoid during pregnancy and breastfeeding unless specifically directed by a physician.
When to stop: Discontinue if you experience worsening symptoms, significant GI distress, unusual bruising, or any reaction that feels out of the ordinary. Quercetin is supportive supplementation—it should make you feel better, not worse.
Liposomal vs. Regular Quercetin
The liposomal argument comes up constantly in MCAS communities. Here’s the honest breakdown.
Standard quercetin has poor oral bioavailability—estimates vary widely but are often cited under 2% for aglycone forms. This is why enhanced delivery systems were developed.
Phytosome quercetin has the strongest human pharmacokinetic evidence, from Riva et al.’s randomized crossover study showing substantially higher plasma concentrations than unformulated quercetin.[5] This is the form to choose if you want absorption data to back your purchase.
Liposomal quercetin has theoretical advantages from phospholipid encapsulation but lacks the same depth of human comparative pharmacokinetic evidence. It may offer excellent absorption, but you’re relying more on the mechanism than on direct human comparison data.
EMIQ has the most direct human clinical trial evidence for allergic symptom relief, specifically in pollinosis studies.
When liposomal makes sense: You react to capsule excipients. You’ve tried other forms without effect. You want a liquid format for precise dose control.
When regular capsules are sufficient: You’re starting out. You’re cost-conscious. You want the best evidence base behind your form choice.
Cost difference is real: liposomal products are typically 2–3x the price of standard quercetin. Phytosome sits in the middle—higher than standard, meaningfully less than most liposomals.
When Quercetin May NOT Help
Quercetin is not a solution for every MCAS or histamine intolerance presentation.
Severe MCAS: If your reactions are frequent, severe, or require emergency medication, quercetin supplementation is far too gentle to be the primary intervention. Work with a specialist first.
Non-histamine triggers: Many MCAS triggers have nothing to do with histamine—heat, pressure, stress, and certain chemicals can activate mast cells through entirely different pathways. Quercetin’s mast-cell-stabilizing effects don’t address all of these.
Gut-driven histamine excess: If your histamine problem stems from bacterial overgrowth (SIBO) or impaired gut barrier function producing histamine, reducing histamine from food won’t touch the root cause—and neither will quercetin. If gut imbalance is suspected, our histamine-safe probiotics guide explains which strains are typically better tolerated.
Malabsorption: If you have significant gut damage or malabsorption issues, even enhanced quercetin forms may not absorb adequately to produce therapeutic effects.
Unrealistic timelines: Some people try quercetin for a week and conclude it doesn’t work. Four to eight weeks of consistent use is the minimum reasonable trial period. Quercetin isn’t an antihistamine—it doesn’t produce hours-long relief.
If quercetin doesn’t help after a genuine 6–8 week trial at adequate doses, that’s useful information. It means your histamine picture likely involves mechanisms quercetin doesn’t address.
Frequently Asked Questions
What is the best quercetin supplement for MCAS? It depends on your sensitivity level. Many practitioners start highly reactive patients with Pure Encapsulations Quercetin because of its minimal excipients. For those who already tolerate supplements well and want stronger absorption, Thorne Quercetin Phytosome is often the next step. Liquid liposomal options may help people who cannot tolerate capsules. As always with MCAS, start low and increase gradually.
How long does quercetin take to work for histamine intolerance? Most practitioners suggest 4–8 weeks of consistent use before evaluating response. Quercetin works upstream—it’s modifying mast cell behavior over time, not blocking histamine in the moment. Don’t judge the outcome after a week.
Is quercetin safe for MCAS? For most people, yes at appropriate doses. However, MCAS patients can react to anything, including well-tolerated supplements. Start with the smallest possible dose of the cleanest formulation available and build slowly. Paradoxical reactions are uncommon but real.
Can you take quercetin daily? Most published safety data covers supplementation up to 12 weeks. Longer-term daily use is common in clinical practice, but robust long-term safety data in humans is still limited, particularly at doses above 1,000mg daily. Use the lowest effective dose.
What is the best time to take quercetin? Before meals—particularly before meals that are higher in histamine-containing or histamine-releasing foods. Taking it 20–30 minutes before eating gives it time to have some effect on mast cell activity before food triggers arrive.
Can quercetin cause side effects? Mild GI discomfort and headache are occasionally reported, usually at higher doses. Paradoxical flares occur in a small subset of MCAS patients. The most clinically significant risk is drug interaction, particularly with warfarin. Always review with your prescriber if you’re on medications.
Is liposomal quercetin better than regular quercetin? It may offer higher absorption, but “better” depends on your situation. Phytosome quercetin has stronger pharmacokinetic evidence from human studies. Liposomal is useful if you react to capsule excipients or want a liquid format. Neither is universally superior to the other.
Can you take quercetin with DAO supplements? Yes, and this combination is commonly used for histamine intolerance. DAO supplements (like Seeking Health HistDAO) address histamine breakdown from food; quercetin addresses mast cell activation and histamine release. If you’re still evaluating DAO support, see our complete guide to DAO supplements. They work through different mechanisms and can be complementary. Our guide to DAO deficiency covers DAO supplementation in more detail.
Who should avoid quercetin? People on warfarin or other anticoagulants should consult their prescriber before starting. Those with kidney disease should use caution. Quercetin should be avoided during pregnancy and breastfeeding. Anyone on multiple medications should review potential CYP enzyme interactions with a pharmacist or physician.
Closing Thoughts
Quercetin isn’t a cure for MCAS or histamine intolerance, but choosing the best quercetin supplement for MCAS can make a meaningful difference for the right person. No supplement is. But for the right person—someone who has already addressed dietary triggers, ruled out underlying causes like SIBO, and is looking for additional mast cell support—it’s one of the better-studied natural options available.
For many readers trying to identify the best quercetin supplement for MCAS, the right starting point is the formula your body tolerates — not necessarily the strongest one on paper.
Choose your form thoughtfully. Start at the lowest reasonable dose. Give it time. Track your response in writing rather than relying on memory. And if you’re on any medications, talk to your prescriber before adding quercetin—particularly if you take anticoagulants.
Individual variability in this space is enormous. Someone else’s experience with a specific brand or dose means very little for predicting yours. Gradual testing is the only reliable method.
If you’re new to managing histamine intolerance, the complete low-histamine food list and the histamine intolerance guide are good places to get the dietary foundation right first. Supplements work best when the basics are already in place.
References
- Weng Z, Zhang B, Asadi S, Sismanopoulos N, Butcher A, Fu X, Katsarou-Katsari A, Antoniou C, Theoharides TC. Quercetin is more effective than cromolyn in blocking human mast cell cytokine release and inhibits contact dermatitis and photosensitivity in humans. PLoS One. 2012;7(3):e33805. PMID: 22470478. https://pubmed.ncbi.nlm.nih.gov/22470478/
- Min YD, Choi CH, Bark H, Son HY, Park HH, Lee S, Park JW, Park EK, Shin HI, Kim SH. Quercetin inhibits expression of inflammatory cytokines through attenuation of NF-kappaB and p38 MAPK in HMC-1 human mast cell line. Inflamm Res. 2007;56:210–215. PMID: 17588137. https://pubmed.ncbi.nlm.nih.gov/17588137/
- Alam SB, Wagner A, Willows S, Kulka M. Quercetin and resveratrol differentially decrease expression of the high-affinity IgE receptor (FcεRI) by human and mouse mast cells. Molecules. 2022;27(19):6704. PMID: 36235240. https://pubmed.ncbi.nlm.nih.gov/36235240/
- Zhao C, Ding Y, Huang Y, Wang C, Guo B, Zhang T. Quercetin attenuates MRGPRX2-mediated mast cell degranulation via the MyD88/IKK/NF-κB and PI3K/AKT/Rac1/Cdc42 pathway. J Inflamm Res. 2024;17:7099–7110. PMID: 39398230. https://pubmed.ncbi.nlm.nih.gov/39398230/
- Riva A, Ronchi M, Petrangolini G, Bosisio S, Allegrini P. Improved oral absorption of quercetin from Quercetin Phytosome®, a new delivery system based on food grade lecithin. Eur J Drug Metab Pharmacokinet. 2019;44(2):169–177. PMID: 30328058. https://pubmed.ncbi.nlm.nih.gov/30328058/
- Yamada S, Shirai M, Inaba Y, Takara T. Effects of repeated oral intake of a quercetin-containing supplement on allergic reaction: a randomized, placebo-controlled, double-blind parallel-group study. Eur Rev Med Pharmacol Sci. 2022;26(12):4331–4345. PMID: 35776034. https://pubmed.ncbi.nlm.nih.gov/35776034/
- Andres S, Pevny S, Ziegenhagen R, Bakhiya N, Schäfer B, Hirsch-Ernst KI, Lampen A. Safety aspects of the use of quercetin as a dietary supplement. Mol Nutr Food Res. 2018;62(1). PMID: 29127724. https://pubmed.ncbi.nlm.nih.gov/29127724/
- Patel R, Stine A, Zitko K. Enhanced anticoagulant effect of warfarin when co-administered with quercetin. Consult Pharm. 2022;38(6):374–375. PMID: 36311308. https://pubmed.ncbi.nlm.nih.gov/36311308/
This article contains affiliate links. If you purchase through these links, we may earn a small commission at no extra cost to you. We only recommend products we believe support effective histamine and mast cell management.
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Quercetin supplements interact with several medications including blood thinners and antibiotics — always disclose supplement use to your healthcare provider. Individual responses vary significantly. If you experience adverse reactions, stop use and consult a qualified healthcare professional. Do not use this information to replace or delay professional medical evaluation or treatment.
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