Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 19 Researches
8.4
USERS' SCORE
Good
Based on 37 Reviews
8.3
Supplement Facts
Serving Size: 2 Veggie Capsules
Amount Per Serving
%DV
Quercetin (as Quercetin Dihydrate)(Dimorphandra mollis) (seed pod)
500 mg
â€
Bromelain (from pineapple stem)(2400 GDU/gram)
250 mg
â€
Top Medical Research Studies
9
Quercetin may alleviate allergy symptoms
We conducted a study involving 66 Japanese adults suffering from allergy symptoms, focusing on the potential of a quercetin-containing supplement. Participants took either the supplement or a placebo daily for four weeks.
Notable results showed that those taking quercetin experienced significant improvements in allergy-related symptoms such as eye itching, sneezing, and nasal discharge. Additionally, their overall quality of life received a boost.
While there were minor side effects, the findings suggest that quercetin might be an effective option for managing certain allergy symptoms.
Notable results showed that those taking quercetin experienced significant improvements in allergy-related symptoms such as eye itching, sneezing, and nasal discharge. Additionally, their overall quality of life received a boost.
While there were minor side effects, the findings suggest that quercetin might be an effective option for managing certain allergy symptoms.
Read More
8
We explored how quercetin may help alleviate allergies by examining its impact on certain immune cells involved in allergic reactions. Using different types of mast cells, we observed that quercetin triggered the production of heme oxygenase-1 (HO-1), which plays a key role in this process.
Interestingly, when we inhibited HO-1, the protective effects of quercetin vanished, suggesting that the Nrf2-HO-1 pathway is crucial for its anti-allergic actions. Our findings strongly indicate that quercetin could be valuable in managing allergic responses.
Interestingly, when we inhibited HO-1, the protective effects of quercetin vanished, suggesting that the Nrf2-HO-1 pathway is crucial for its anti-allergic actions. Our findings strongly indicate that quercetin could be valuable in managing allergic responses.
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9.5
We delved into the effects of quercetin on peanut-induced anaphylactic reactions using a rat model. The study involved sensitized Wistar rats divided into treatment and control groups. After four weeks of quercetin treatment, we observed a significant decrease in plasma histamine levels and anaphylactic responses.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Read More
Most Useful Reviews
9
No more sinusitis
121 people found this helpful
No more sinusitis and Eustachian tube dysfunction. I had chronic sinusitis caused by a dysfunctional Eustachian tube due to allergies. My ears felt full, and my hearing was muffled. After years of antibiotics and feeling weighed down by allergy pills, I sought alternatives. After trying this product, I’ve experienced great results over the past few months—no more sinusitis or ear fullness. If my nose starts to clog up, I take the product, and it clears my sinuses. I am optimistic it will work well during pollen season too. However, caution is advised for those with kidney issues and regarding long-term usage of bromelain.
Read More
9
Long-term relief
23 people found this helpful
This product is fantastic for allergy relief! After enduring years of allergies, I no longer suffer. It doesn’t work instantly; it took about six months before I noticed a significant difference.
Read More
9
Significant difference
18 people found this helpful
My husband and the dog love this! I initially got these for my dog due to her skin allergies. I give her one daily along with a fish oil capsule wrapped in cheese, which has greatly improved her skin. My husband also takes them for his constant runny nose and blocked ears, stating they have made a significant difference, so he'll continue using them.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 19 Researches
8.4
- All Researches
9.5
We delved into the effects of quercetin on peanut-induced anaphylactic reactions using a rat model. The study involved sensitized Wistar rats divided into treatment and control groups. After four weeks of quercetin treatment, we observed a significant decrease in plasma histamine levels and anaphylactic responses.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Read More
9.5
The study looked into how plant-made influenza vaccines interact with the immune system, particularly concerning allergies. We followed 280 participants over six months, monitoring for allergic reactions and measuring specific antibodies.
While some subjects produced temporary IgG and occasionally IgE antibodies, no allergic symptoms were reported. Importantly, the study found these antibody responses were not tied to allergy worsening, indicating that these vaccines may be safe for those with known plant allergies.
While some subjects produced temporary IgG and occasionally IgE antibodies, no allergic symptoms were reported. Importantly, the study found these antibody responses were not tied to allergy worsening, indicating that these vaccines may be safe for those with known plant allergies.
Read More
9
Quercetin shows promise in allergies
We delved into the potential of quercetin as a therapeutic option for treating allergic rhinitis, a common condition affecting roughly 40% of the global population. This study utilized various in-silico approaches, such as network pharmacology and molecular docking, to identify compounds from traditional medicinal plants and assess their effectiveness.
Among the 241 compounds analyzed, quercetin stood out due to its strong binding affinities with important targets linked to inflammatory and immune pathways. Our assessments indicated that quercetin could interact effectively with key cytokines involved in allergic reactions, potentially reducing allergy symptoms.
While the study highlighted promising implications for quercetin, it did not isolate its effects from other examined compounds. Therefore, further experimental testing is needed to affirm its benefits and effectiveness in real-world allergy treatment situations.
Among the 241 compounds analyzed, quercetin stood out due to its strong binding affinities with important targets linked to inflammatory and immune pathways. Our assessments indicated that quercetin could interact effectively with key cytokines involved in allergic reactions, potentially reducing allergy symptoms.
While the study highlighted promising implications for quercetin, it did not isolate its effects from other examined compounds. Therefore, further experimental testing is needed to affirm its benefits and effectiveness in real-world allergy treatment situations.
Read More
9
We investigated how a specific leaf extract affects allergic inflammation in immune cell lines.
Our study revealed that this extract notably reduced the release of allergy-related chemicals like histamine. It also decreased inflammatory responses by limiting the activity of certain enzymes involved in inflammation.
The findings suggest that the active compounds in the extract, specifically quercetin and kaempferol, could offer therapeutic benefits in managing allergies.
Our study revealed that this extract notably reduced the release of allergy-related chemicals like histamine. It also decreased inflammatory responses by limiting the activity of certain enzymes involved in inflammation.
The findings suggest that the active compounds in the extract, specifically quercetin and kaempferol, could offer therapeutic benefits in managing allergies.
Read More
9
Quercetin may alleviate allergy symptoms
We conducted a study involving 66 Japanese adults suffering from allergy symptoms, focusing on the potential of a quercetin-containing supplement. Participants took either the supplement or a placebo daily for four weeks.
Notable results showed that those taking quercetin experienced significant improvements in allergy-related symptoms such as eye itching, sneezing, and nasal discharge. Additionally, their overall quality of life received a boost.
While there were minor side effects, the findings suggest that quercetin might be an effective option for managing certain allergy symptoms.
Notable results showed that those taking quercetin experienced significant improvements in allergy-related symptoms such as eye itching, sneezing, and nasal discharge. Additionally, their overall quality of life received a boost.
While there were minor side effects, the findings suggest that quercetin might be an effective option for managing certain allergy symptoms.
Read More
User Reviews
USERS' SCORE
Good
Based on 37 Reviews
8.3
- All Reviews
- Positive Reviews
- Negative Reviews
9
No more sinusitis
121 people found this helpful
No more sinusitis and Eustachian tube dysfunction. I had chronic sinusitis caused by a dysfunctional Eustachian tube due to allergies. My ears felt full, and my hearing was muffled. After years of antibiotics and feeling weighed down by allergy pills, I sought alternatives. After trying this product, I’ve experienced great results over the past few months—no more sinusitis or ear fullness. If my nose starts to clog up, I take the product, and it clears my sinuses. I am optimistic it will work well during pollen season too. However, caution is advised for those with kidney issues and regarding long-term usage of bromelain.
Read More
9
Long-term relief
23 people found this helpful
This product is fantastic for allergy relief! After enduring years of allergies, I no longer suffer. It doesn’t work instantly; it took about six months before I noticed a significant difference.
Read More
9
Significant difference
18 people found this helpful
My husband and the dog love this! I initially got these for my dog due to her skin allergies. I give her one daily along with a fish oil capsule wrapped in cheese, which has greatly improved her skin. My husband also takes them for his constant runny nose and blocked ears, stating they have made a significant difference, so he'll continue using them.
Read More
9
Dog allergy relief
14 people found this helpful
After a year of battling my dog's allergies, I discovered her issues stemmed from environmental allergies rather than food. I sought alternative solutions after antibiotics failed. Along with making homemade food, quercetin has transformed her condition within a week, freeing her from constant itching and discomfort. This supplement has undeniably improved her quality of life.
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10
Better than Zyrtec
13 people found this helpful
I started using this product for my allergies based on a recommendation. It exceeded my expectations in just a week! I experienced no allergy symptoms, unlike my previous medication, Zyrtec, which only somewhat alleviated my symptoms. After two months, I still feel great with no symptoms. Even my mother-in-law found more relief with this than her previous medication. When I briefly returned to Zyrtec, I ended up congested again, but within 36 hours of resuming this product, my congestion cleared.
Read More
Frequently Asked Questions
No FAQs are available for this product and symptom.
References
- Islam KMT, Mahmud S. In-silico exploring pathway and mechanism-based therapeutics for allergic rhinitis: Network pharmacology, molecular docking, ADMET, quantum chemistry and machine learning based QSAR approaches. Comput Biol Med. 2025;187:109754. 10.1016/j.compbiomed.2025.109754
- Bunddulam P, Nakamura M, Zorig A, Hinata Y, Takasugi M, et al. Effects of Leaf Extract on Allergic Inflammation in Immune Cell Lines. Prev Nutr Food Sci. 2025;30:68. 10.3746/pnf.2025.30.1.68
- Kaag S, Lorentz A. Effects of Dietary Components on Mast Cells: Possible Use as Nutraceuticals for Allergies?. Cells. 2023;12. 10.3390/cells12222602
- Mizuno M, Fujioka A, Bitani S, Minato KI, Sakakibara H. Anti-Allergic Activity of Fucoidan Can Be Enhanced by Coexistence with Quercetin. Int J Mol Sci. 2022;23. 10.3390/ijms232012163
- 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;26:4331. 10.26355/eurrev_202206_29072
- Afify SM, Pali-Schöll I, Hufnagl K, Hofstetter G, El-Bassuoni MA, et al. Bovine Holo-Beta-Lactoglobulin Cross-Protects Against Pollen Allergies in an Innate Manner in BALB/c Mice: Potential Model for the Farm Effect. Front Immunol. 2021;12:611474. 10.3389/fimmu.2021.611474
- Ding Y, Che D, Li C, Cao J, Wang J, et al. Quercetin inhibits Mrgprx2-induced pseudo-allergic reaction via PLCγ-IP3R related Ca fluctuations. Int Immunopharmacol. 2019;66:185. 10.1016/j.intimp.2018.11.025
- Carbone ML, Lulli D, Passarelli F, Pastore S. Topical Plant Polyphenols Prevent Type I Interferon Signaling in the Skin and Suppress Contact Hypersensitivity. Int J Mol Sci. 2018;19. 10.3390/ijms19092652
- Takasugi M, Muta E, Yamada K, Arai H. A new method to evaluate anti-allergic effect of food component by measuring leukotriene B from a mouse mast cell line. Cytotechnology. 2018;70:177. 10.1007/s10616-017-0129-9
- Kim M, Lim SJ, Kang SW, Um BH, Nho CW. Aceriphyllum rossii extract and its active compounds, quercetin and kaempferol inhibit IgE-mediated mast cell activation and passive cutaneous anaphylaxis. J Agric Food Chem. 2014;62:3750. 10.1021/jf405486c
- Shishehbor F, Behroo L, Ghafouriyan Broujerdnia M, Namjoyan F, Latifi SM. Quercetin effectively quells peanut-induced anaphylactic reactions in the peanut sensitized rats. Iran J Allergy Asthma Immunol. 2010;9:27.
- Matsushima M, Takagi K, Ogawa M, Hirose E, Ota Y, et al. Heme oxygenase-1 mediates the anti-allergic actions of quercetin in rodent mast cells. Inflamm Res. 2009;58:705. 10.1007/s00011-009-0039-1
- Cruz EA, Da-Silva SA, Muzitano MF, Silva PM, Costa SS, et al. Immunomodulatory pretreatment with Kalanchoe pinnata extract and its quercitrin flavonoid effectively protects mice against fatal anaphylactic shock. Int Immunopharmacol. 2008;8:1616. 10.1016/j.intimp.2008.07.006
- Shaik YB, Castellani ML, Perrella A, Conti F, Salini V, et al. Role of quercetin (a natural herbal compound) in allergy and inflammation. J Biol Regul Homeost Agents. 2006;20:47.
- Rogerio AP, Kanashiro A, Fontanari C, da Silva EV, Lucisano-Valim YM, et al. Anti-inflammatory activity of quercetin and isoquercitrin in experimental murine allergic asthma. Inflamm Res. 2007;56:402.
- Abram DM, Fernandes LGR, Perez-Riverol A, Regina Brochetto-Braga M, Zollner RL. Cross-Reactive Carbohydrate Determinant in , and Venoms: Identification of Allergic Sensitization and Cross-Reactivity. Toxins (Basel). 2020;12. 10.3390/toxins12100649
- Ward BJ, Landry N, Trépanier S, Mercier G, Dargis M, et al. Human antibody response to N-glycans present on plant-made influenza virus-like particle (VLP) vaccines. Vaccine. 2014;32:6098. 10.1016/j.vaccine.2014.08.079
- Secor ER, Carson WF, Cloutier MM, Guernsey LA, Schramm CM, et al. Bromelain exerts anti-inflammatory effects in an ovalbumin-induced murine model of allergic airway disease. Cell Immunol. 2005;237:68.
- Braun JM, Schneider B, Beuth HJ. Therapeutic use, efficiency and safety of the proteolytic pineapple enzyme Bromelain-POS in children with acute sinusitis in Germany. In Vivo. 2005;19:417.
