Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 35 Reviews
8.1
Supplement Facts
Serving Size: 1 Vegetarian Tablet
Amount Per Serving
%DV
Vitamin C (as ascorbic acid)
1000 mg
1111%
Bio-Quercetin® Proprietary Blend[providing 35% quercetin (5 mg) [from Japanese sophora concentrate (flower bud)],30% galactomannans (4 mg) [from fenugreek (seed)]
15 mg
**
Top Medical Research Studies
8
We conducted a thorough evaluation of how vitamin C, when combined with pleuran, impacts asthma control and respiratory issues in children suffering from perennial asthma. The study was meticulously designed as a double-blind, placebo-controlled trial involving 230 children aged 7 to 17 years. This means that neither the participants nor the researchers knew who was receiving the active treatment or the placebo, ensuring the findings were reliable.
The results were promising, especially for children under 12 years. They showed significant improvements in asthma control compared to those receiving only the placebo treatment. Meanwhile, older children (12 years and above) experienced fewer respiratory infections with the combination treatment. Overall, by the end of the 48 weeks, a majority of children on the pleuran and vitamin C treatment reported better asthma control compared to those on the placebo.
While the combination of pleuran and vitamin C was indeed beneficial for managing asthma, we must note that the study did not specifically isolate the effect of vitamin C alone on allergies or asthma. Thus, it is hard to draw definitive conclusions about vitamin C's effectiveness independently from pleuran. However, the approach suggested that using these supplements together could offer a helpful boost in managing asthma symptoms.
The results were promising, especially for children under 12 years. They showed significant improvements in asthma control compared to those receiving only the placebo treatment. Meanwhile, older children (12 years and above) experienced fewer respiratory infections with the combination treatment. Overall, by the end of the 48 weeks, a majority of children on the pleuran and vitamin C treatment reported better asthma control compared to those on the placebo.
While the combination of pleuran and vitamin C was indeed beneficial for managing asthma, we must note that the study did not specifically isolate the effect of vitamin C alone on allergies or asthma. Thus, it is hard to draw definitive conclusions about vitamin C's effectiveness independently from pleuran. However, the approach suggested that using these supplements together could offer a helpful boost in managing asthma symptoms.
Read More
Most Useful Reviews
9
Immunity support
50 people found this helpful
A great product of very good quality. The composition is excellent and easily digestible, without causing discomfort. I can finally take vitamin C without my stomach reacting. My family takes it each morning for immunity. Highly recommend, especially in autumn!
Read More
9
Allergy treatment
3 people found this helpful
Good vitamin C with Quercetin! It helps with respiratory infections, flu, and allergies. I find it effective for inflammation and also in treating various conditions. It's effective from the first days.
Read More
9
Effective for allergies
3 people found this helpful
One of the best vitamin Cs, particularly beneficial due to the quercetin it contains. I take it alongside other supplements, and it's been fantastic throughout the pandemic. As an allergy sufferer, it suits me perfectly.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
- All Researches
8
We conducted a thorough evaluation of how vitamin C, when combined with pleuran, impacts asthma control and respiratory issues in children suffering from perennial asthma. The study was meticulously designed as a double-blind, placebo-controlled trial involving 230 children aged 7 to 17 years. This means that neither the participants nor the researchers knew who was receiving the active treatment or the placebo, ensuring the findings were reliable.
The results were promising, especially for children under 12 years. They showed significant improvements in asthma control compared to those receiving only the placebo treatment. Meanwhile, older children (12 years and above) experienced fewer respiratory infections with the combination treatment. Overall, by the end of the 48 weeks, a majority of children on the pleuran and vitamin C treatment reported better asthma control compared to those on the placebo.
While the combination of pleuran and vitamin C was indeed beneficial for managing asthma, we must note that the study did not specifically isolate the effect of vitamin C alone on allergies or asthma. Thus, it is hard to draw definitive conclusions about vitamin C's effectiveness independently from pleuran. However, the approach suggested that using these supplements together could offer a helpful boost in managing asthma symptoms.
The results were promising, especially for children under 12 years. They showed significant improvements in asthma control compared to those receiving only the placebo treatment. Meanwhile, older children (12 years and above) experienced fewer respiratory infections with the combination treatment. Overall, by the end of the 48 weeks, a majority of children on the pleuran and vitamin C treatment reported better asthma control compared to those on the placebo.
While the combination of pleuran and vitamin C was indeed beneficial for managing asthma, we must note that the study did not specifically isolate the effect of vitamin C alone on allergies or asthma. Thus, it is hard to draw definitive conclusions about vitamin C's effectiveness independently from pleuran. However, the approach suggested that using these supplements together could offer a helpful boost in managing asthma symptoms.
Read More
User Reviews
USERS' SCORE
Good
Based on 35 Reviews
8.1
- All Reviews
- Positive Reviews
- Negative Reviews
9
Immunity support
50 people found this helpful
A great product of very good quality. The composition is excellent and easily digestible, without causing discomfort. I can finally take vitamin C without my stomach reacting. My family takes it each morning for immunity. Highly recommend, especially in autumn!
Read More
9
Allergy treatment
3 people found this helpful
Good vitamin C with Quercetin! It helps with respiratory infections, flu, and allergies. I find it effective for inflammation and also in treating various conditions. It's effective from the first days.
Read More
9
Effective for allergies
3 people found this helpful
One of the best vitamin Cs, particularly beneficial due to the quercetin it contains. I take it alongside other supplements, and it's been fantastic throughout the pandemic. As an allergy sufferer, it suits me perfectly.
Read More
9
Improved health
3 people found this helpful
Quercetin, known as the king of flavonoids, works well with vitamin C to alleviate allergies and relieve inflammation. I take this supplement after meals, and the results have been wonderful—my health has improved dramatically.
Read More
9
No drowsy side effects
3 people found this helpful
Natural method to combat seasonal allergies. My holistic doctor recommended this for my seasonal allergies, and it really works! No more drowsy side effects! I love this!
Read More
Frequently Asked Questions
9
Calms nasal allergies
I learned that quercetin is beneficial for allergies, and it has significantly eased my nasal issues caused by dust. The 1000 mg in one tablet is easily absorbed.
9
Improves allergy symptoms
1 people found this helpful
My gynecologist advised me to take this due to a slight urinary issue. Within a week, I noticed improvement, and it has also helped with my seasonal allergies, lessening my discomfort. The tablets have a slightly acidic, sugar-free citrus flavour.
7.5
Helps with allergies
1 people found this helpful
Mumtaz: I use this type of vitamin C with quercetin for its effectiveness against allergies, particularly during the fall and spring when my sinuses are troubled. The pill is quite large, but I find it easy to swallow. It energises me, so I avoid taking it at night and can consume it with or without food.
9
Improved health
3 people found this helpful
Quercetin, known as the king of flavonoids, works well with vitamin C to alleviate allergies and relieve inflammation. I take this supplement after meals, and the results have been wonderful—my health has improved dramatically.
9
Allergy treatment
3 people found this helpful
Good vitamin C with Quercetin! It helps with respiratory infections, flu, and allergies. I find it effective for inflammation and also in treating various conditions. It's effective from the first days.
9
Effective defence
1 people found this helpful
Life Extension Vitamin C and Bio-Quercetin have become essential in my daily routine. The combination effectively boosts immunity and provides a great defence against allergies.
7.5
Supports health
1 people found this helpful
I recently started using Life Extension Vitamin C and Bio-Quercetin. The vegetarian tablets are cost-effective, easy to swallow, and have helped with my seasonal allergies. I’m very pleased with the results.
9
Effective for allergies
3 people found this helpful
One of the best vitamin Cs, particularly beneficial due to the quercetin it contains. I take it alongside other supplements, and it's been fantastic throughout the pandemic. As an allergy sufferer, it suits me perfectly.
9
Boosts immune system
2 people found this helpful
Excellent product! The combination of Vitamin C 1000mg and Bio-quercetin significantly boosts my immune system and helps manage my allergies. Highly recommended.
References
- Jesenak M, Hrubisko M, Chudek J, Bystron J, Rennerova Z, et al. Beneficial effects of pleuran on asthma control and respiratory tract-infection frequency in children with perennial asthma. Sci Rep. 2025;15:7146. doi:10.1038/s41598-025-91830-2
