Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 8 Researches
8
USERS' SCORE
Good
Based on 8 Reviews
8.3
Supplement Facts
Serving Size: 1 Capsule
Amount Per Serving
%DV
Quercetin
500 mg
†
Top Medical Research Studies
8
We investigated quercetin's potential to combat pneumonia and its inflammatory effects triggered by lipopolysaccharide (LPS) using human alveolar epithelial cells. Our findings revealed that quercetin significantly reduced the release of key inflammatory markers and apoptosis in these cells, suggesting it may help manage lung inflammation. By activating the Nrf2 signaling pathway, quercetin not only diminishes inflammation but also protects cells from oxidative stress. Overall, while quercetin shows promise, its effectiveness as a standalone treatment for pneumonia remains unclear.
Read More
9
Quercetin protects against lung injury
This study asked if quercetin, a natural compound, could help treat lung damage caused by particulate matter (PM), a common air pollutant. We treated mice with PM alongside quercetin and noticed significant improvements, as quercetin reduced lung inflammation, fibrosis, and harmful lipid accumulation.
By working through a specific signaling pathway (Nrf2-Keap1), quercetin not only diminished the markers of ferroptosis but also decreased inflammatory responses. Our findings highlight quercetin's potential as a protective agent against air pollution-related lung injuries.
By working through a specific signaling pathway (Nrf2-Keap1), quercetin not only diminished the markers of ferroptosis but also decreased inflammatory responses. Our findings highlight quercetin's potential as a protective agent against air pollution-related lung injuries.
Read More
8
We explored how quercetin, a natural flavonoid found in fruits and veggies, impacts pneumonia caused by the pathogen Pseudomonas aeruginosa. Through various experiments, we found that quercetin helps lessen inflammation in the lungs by reducing harmful cell signals and cytokines typically associated with infection. Mice treated with quercetin showed fewer symptoms of lung injury and lower levels of inflammatory proteins compared to untreated mice. Simply put, quercetin appears to offer protective effects against lung inflammation triggered by this opportunistic pathogen.
Read More
Most Useful Reviews
9
Improve lung function
9 people found this helpful
The quality is good; my whole family took it during covid. Our Ukrainian scientists noted quercetin's effectiveness in covid pneumonia and inflammation, improving lung function recovery.
Read More
9
Pneumonia prevention
Excellent product! I purchased several bottles to prevent coronavirus pneumonia.
Read More
7.5
Prevents pulmonary fibrosis
If you suffer from covid pneumonia, quercetin can help prevent pulmonary fibrosis.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 8 Researches
8
- All Researches
9
Quercetin protects against lung injury
This study asked if quercetin, a natural compound, could help treat lung damage caused by particulate matter (PM), a common air pollutant. We treated mice with PM alongside quercetin and noticed significant improvements, as quercetin reduced lung inflammation, fibrosis, and harmful lipid accumulation.
By working through a specific signaling pathway (Nrf2-Keap1), quercetin not only diminished the markers of ferroptosis but also decreased inflammatory responses. Our findings highlight quercetin's potential as a protective agent against air pollution-related lung injuries.
By working through a specific signaling pathway (Nrf2-Keap1), quercetin not only diminished the markers of ferroptosis but also decreased inflammatory responses. Our findings highlight quercetin's potential as a protective agent against air pollution-related lung injuries.
Read More
9
Quercetin aids H1N1 pneumonia treatment
We explored the therapeutic abilities of quercetin and other flavonoids from Houttuynia cordata against H1N1-induced pneumonia in mice. Our findings confirmed that quercetin, along with hyperoside and quercitrin, significantly reduced inflammation and improved lung health in the study subjects.
The conversion of these flavonoids by intestinal bacteria into quercetin appeared to enhance their therapeutic effects. Overall, our research highlights quercetin's potential as a supportive treatment for respiratory conditions caused by H1N1, showing promise for further exploration in human studies.
The conversion of these flavonoids by intestinal bacteria into quercetin appeared to enhance their therapeutic effects. Overall, our research highlights quercetin's potential as a supportive treatment for respiratory conditions caused by H1N1, showing promise for further exploration in human studies.
Read More
8
We investigated quercetin's potential to combat pneumonia and its inflammatory effects triggered by lipopolysaccharide (LPS) using human alveolar epithelial cells. Our findings revealed that quercetin significantly reduced the release of key inflammatory markers and apoptosis in these cells, suggesting it may help manage lung inflammation. By activating the Nrf2 signaling pathway, quercetin not only diminishes inflammation but also protects cells from oxidative stress. Overall, while quercetin shows promise, its effectiveness as a standalone treatment for pneumonia remains unclear.
Read More
8
We explored how quercetin, a natural flavonoid found in fruits and veggies, impacts pneumonia caused by the pathogen Pseudomonas aeruginosa. Through various experiments, we found that quercetin helps lessen inflammation in the lungs by reducing harmful cell signals and cytokines typically associated with infection. Mice treated with quercetin showed fewer symptoms of lung injury and lower levels of inflammatory proteins compared to untreated mice. Simply put, quercetin appears to offer protective effects against lung inflammation triggered by this opportunistic pathogen.
Read More
8
We explored a new approach for treating pneumonia using engineered "zombie" macrophages as carriers for quercetin, a natural compound. These macrophages showed better stability than live ones, allowing us to store them and use them as needed.
In tests with mice suffering from acute pneumonia, the "zombie" macrophages effectively delivered quercetin to inflamed lung tissues and helped reduce inflammation. This shows promise for quicker and more effective treatments in acute cases.
In tests with mice suffering from acute pneumonia, the "zombie" macrophages effectively delivered quercetin to inflamed lung tissues and helped reduce inflammation. This shows promise for quicker and more effective treatments in acute cases.
Read More
User Reviews
USERS' SCORE
Good
Based on 8 Reviews
8.3
- All Reviews
- Positive Reviews
- Negative Reviews
9
Improve lung function
9 people found this helpful
The quality is good; my whole family took it during covid. Our Ukrainian scientists noted quercetin's effectiveness in covid pneumonia and inflammation, improving lung function recovery.
Read More
9
Pneumonia prevention
Excellent product! I purchased several bottles to prevent coronavirus pneumonia.
Read More
7.5
Prevents pulmonary fibrosis
If you suffer from covid pneumonia, quercetin can help prevent pulmonary fibrosis.
Read More
7.5
Prevented pneumonia
3 people found this helpful
With covid, I used quercetin, which inhibits viral replication. Combined with zinc and vitamins C and D, it helped me recover from covid without pneumonia. It’s now a staple in my first aid kit.
Read More
8
Effectively prevents pneumonia
This has been repurchased multiple times for effectively preventing new crown pneumonia.
Read More
Frequently Asked Questions
7.5
Helps with pneumonia
After contracting coronavirus, I coughed for three months but continued to take quercetin. I now believe it aids in recovery from pneumonia and tuberculosis.
7.5
Prevented pneumonia
3 people found this helpful
With covid, I used quercetin, which inhibits viral replication. Combined with zinc and vitamins C and D, it helped me recover from covid without pneumonia. It’s now a staple in my first aid kit.
7.5
Good for pneumonia
I take quercetin for illness or inflammation. It’s a good antioxidant that strengthens immunity and helps treat respiratory diseases effectively, especially pneumonia.
9
Improve lung function
9 people found this helpful
The quality is good; my whole family took it during covid. Our Ukrainian scientists noted quercetin's effectiveness in covid pneumonia and inflammation, improving lung function recovery.
7.5
Prevents pulmonary fibrosis
If you suffer from covid pneumonia, quercetin can help prevent pulmonary fibrosis.
8
Effectively prevents pneumonia
This has been repurchased multiple times for effectively preventing new crown pneumonia.
7.5
Strengthens immunity
Quercetin is a great anti-inflammatory that I take for any illness or inflammation. During covid, it proved to be a good antioxidant, strengthening immunity and helping respiratory diseases recover faster.
8
We investigated quercetin's potential to combat pneumonia and its inflammatory effects triggered by lipopolysaccharide (LPS) using human alveolar epithelial cells. Our findings revealed that quercetin significantly reduced the release of key inflammatory markers and apoptosis in these cells, suggesting it may help manage lung inflammation. By activating the Nrf2 signaling pathway, quercetin not only diminishes inflammation but also protects cells from oxidative stress. Overall, while quercetin shows promise, its effectiveness as a standalone treatment for pneumonia remains unclear.
8
We explored how quercetin, a natural flavonoid found in fruits and veggies, impacts pneumonia caused by the pathogen Pseudomonas aeruginosa. Through various experiments, we found that quercetin helps lessen inflammation in the lungs by reducing harmful cell signals and cytokines typically associated with infection. Mice treated with quercetin showed fewer symptoms of lung injury and lower levels of inflammatory proteins compared to untreated mice. Simply put, quercetin appears to offer protective effects against lung inflammation triggered by this opportunistic pathogen.
7
We examined how quercetin affected inflammation in pneumonia using a mouse model. In our experiment, mice were divided into different groups receiving quercetin, fraxin, dexamethasone, or a combination of fraxin and quercetin before being induced with a pneumonia-like condition.
All treatments appeared to lower harmful cytokines and protect tissues from damage. While quercetin showed promise, its impact was generally comparable to other treatments without a standout effect.
This research provides insights into potential anti-inflammatory strategies, though we found no significant benefits uniquely attributed to quercetin.
All treatments appeared to lower harmful cytokines and protect tissues from damage. While quercetin showed promise, its impact was generally comparable to other treatments without a standout effect.
This research provides insights into potential anti-inflammatory strategies, though we found no significant benefits uniquely attributed to quercetin.
8
We explored a new approach for treating pneumonia using engineered "zombie" macrophages as carriers for quercetin, a natural compound. These macrophages showed better stability than live ones, allowing us to store them and use them as needed.
In tests with mice suffering from acute pneumonia, the "zombie" macrophages effectively delivered quercetin to inflamed lung tissues and helped reduce inflammation. This shows promise for quicker and more effective treatments in acute cases.
In tests with mice suffering from acute pneumonia, the "zombie" macrophages effectively delivered quercetin to inflamed lung tissues and helped reduce inflammation. This shows promise for quicker and more effective treatments in acute cases.
References
- Philippova A, Aringazina R, Lozano R, Tikhonova Y. Correction of hypoxic effects on target organs in pneumonia with phytotherapy. J Complement Integr Med. 2025;22:200. doi:10.1515/jcim-2024-0214
- Shaker NS, Sahib HB, Tahseen NJ. Anti-cytokine Storm Activity of Fraxin, Quercetin, and their Combination on Lipopolysaccharide-Induced Cytokine Storm in Mice: Implications in COVID-19. Iran J Med Sci. 2024;49:322. doi:10.30476/ijms.2023.98947.3102
- Lv P, Han P, Cui Y, Chen Q, Cao W. Quercetin attenuates inflammation in LPS-induced lung epithelial cells via the Nrf2 signaling pathway. Immun Inflamm Dis. 2024;12:e1185. doi:10.1002/iid3.1185
- Jia X, Gu M, Dai J, Wang J, Zhang Y, et al. Quercetin attenuates Pseudomonas aeruginosa-induced acute lung inflammation by inhibiting PI3K/AKT/NF-κB signaling pathway. Inflammopharmacology. 2024;32:1059. doi:10.1007/s10787-023-01416-5
- Ding S, Jiang J, Li Y. Quercetin alleviates PM-induced chronic lung injury in mice by targeting ferroptosis. PeerJ. 2024;12:e16703. doi:10.7717/peerj.16703
- Xu X, Kwong CHT, Li J, Wei J, Wang R. "Zombie" Macrophages for Targeted Drug Delivery to Treat Acute Pneumonia. ACS Appl Mater Interfaces. 2023;15:29012. doi:10.1021/acsami.3c06025
- Tang J, Zhou L, Yuan G, Liu Y, Shi X, et al. Therapeutic effects on H1N1-induced pneumonia in mice and intestinal bacteria biotransformation of four main flavonoids from Houttuynia cordata Thunb. J Pharm Biomed Anal. 2023;233:115469. doi:10.1016/j.jpba.2023.115469
- Sun YL, Zhao PP, Zhu CB, Jiang MC, Li XM, et al. Integrating metabolomics and network pharmacology to assess the effects of quercetin on lung inflammatory injury induced by human respiratory syncytial virus. Sci Rep. 2023;13:8051. doi:10.1038/s41598-023-35272-8
