Last update
3/8/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7
USERS' SCORE
Good
Based on 3 Reviews
8.5
Supplement Facts
Serving Size: 1 Vegetarian Tablet
Amount Per Serving
%DV
Vitamin C (as Ester-C® Calcium Ascorbate)
1,000 mg (1 g)
1,111%
Calcium (as Ester-C® Calcium Ascorbate)
110 mg
8%
Citrus Bioflavonoids ComplexCitrus Bioflavonoids (Citrus sinensis) (fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola, Rutin, Hesperidin Complex (Citrus spp.) (fruit), Naturally Occurring Vitamin C Metabolites
200 mg
**
Top Medical Research Studies
7
Dietary vitamin C reduces smoking-related cough
A survey of 4,300 young Norwegian adults examined whether dietary vitamin C intake relates to respiratory symptoms like cough and wheeze. Researchers estimated vitamin C consumption through questions about orange juice, oranges, potatoes, carrots, and tomatoes over the past year.
Among current smokers, those consuming more dietary vitamin C (395+ mg/week versus under 209 mg/week) showed reduced odds of morning cough and chronic cough. The protective effect was even stronger for ex-smokers experiencing wheeze. These benefits held true even after excluding people taking vitamin C supplements, suggesting the effect comes from food sources themselves.
The findings suggest that vitamin C's antioxidant properties may help counteract oxidative stress caused by smoking, potentially easing respiratory symptoms in smokers specifically.
Among current smokers, those consuming more dietary vitamin C (395+ mg/week versus under 209 mg/week) showed reduced odds of morning cough and chronic cough. The protective effect was even stronger for ex-smokers experiencing wheeze. These benefits held true even after excluding people taking vitamin C supplements, suggesting the effect comes from food sources themselves.
The findings suggest that vitamin C's antioxidant properties may help counteract oxidative stress caused by smoking, potentially easing respiratory symptoms in smokers specifically.
Read More
7
Vitamin C fruit reduces childhood wheezing effectively
A large-scale study involving nearly 19,000 Italian children aged 6-7 years examined whether eating citrus fruits and kiwis—both rich in vitamin C—could reduce respiratory symptoms like wheezing and chronic cough. Parents reported their children's fruit intake and respiratory health through standardized questionnaires, with a subset of over 4,100 children followed up one year later.
The findings were striking: children eating vitamin C-rich fruit five to seven times weekly showed significantly lower rates of chronic cough compared to those eating it less than once weekly. Notably, even modest consumption of just one to two servings per week offered protective benefits. The effect was particularly pronounced among children with a history of asthma, with weekly fruit eaters experiencing less than half the wheezing incidents of infrequent consumers.
The findings were striking: children eating vitamin C-rich fruit five to seven times weekly showed significantly lower rates of chronic cough compared to those eating it less than once weekly. Notably, even modest consumption of just one to two servings per week offered protective benefits. The effect was particularly pronounced among children with a history of asthma, with weekly fruit eaters experiencing less than half the wheezing incidents of infrequent consumers.
Read More
Most Useful Reviews
9
Effective for health
4 people found this helpful
This is undoubtedly the best medicine! Admittedly, I lack the detailed knowledge of others who praised it, but I must share my experience. My husband became unwell with a temperature of 38.5 degrees, refusing to drink anything. After some persuasion, he tried the product, and by the evening, his fever had gone. By morning, he felt completely better with no lingering symptoms like a chronic cough. He was pleasantly surprised and now continues to take it willingly. We found the product to be effective and worth the investment, despite initial apprehensions about the price. I’ve even shared it with my family, as it seems to support our health significantly. Dosage varies per individual, but I know what works for us.
Read More
9
Cold treatment aid
An excellent aid for colds! Although vitamin C doses over 500 mg aren't typically absorbed, I find that taking 1 g during illness boosts my immune response. This vitamin should be a staple in every family's medicine cabinet. It not only shortens recovery time from colds but also makes their symptoms more manageable. Unlike regular vitamin C, which aggravates my chronic gastritis, this Ester-C variant doesn’t cause any discomfort. It's an effective antioxidant, strengthens blood vessels, and helps prevent cholesterol plaques. Trust me, this product is essential.
Read More
7.5
Sore throat relief
Very good vitamin C, which I've ordered a second time. My family and I drink it in autumn and spring. If I sense an illness coming, I start taking it, and symptoms usually recede quickly or don’t materialise at all. Previously, I suffered from a sore throat at the slightest cold due to my chronic tonsillitis, but since taking this vitamin, I’ve forgotten about the discomfort. It truly has been a game-changer in maintaining our health through seasonal changes.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7
- All Researches
7
Dietary vitamin C reduces smoking-related cough
A survey of 4,300 young Norwegian adults examined whether dietary vitamin C intake relates to respiratory symptoms like cough and wheeze. Researchers estimated vitamin C consumption through questions about orange juice, oranges, potatoes, carrots, and tomatoes over the past year.
Among current smokers, those consuming more dietary vitamin C (395+ mg/week versus under 209 mg/week) showed reduced odds of morning cough and chronic cough. The protective effect was even stronger for ex-smokers experiencing wheeze. These benefits held true even after excluding people taking vitamin C supplements, suggesting the effect comes from food sources themselves.
The findings suggest that vitamin C's antioxidant properties may help counteract oxidative stress caused by smoking, potentially easing respiratory symptoms in smokers specifically.
Among current smokers, those consuming more dietary vitamin C (395+ mg/week versus under 209 mg/week) showed reduced odds of morning cough and chronic cough. The protective effect was even stronger for ex-smokers experiencing wheeze. These benefits held true even after excluding people taking vitamin C supplements, suggesting the effect comes from food sources themselves.
The findings suggest that vitamin C's antioxidant properties may help counteract oxidative stress caused by smoking, potentially easing respiratory symptoms in smokers specifically.
Read More
7
Vitamin C fruit reduces childhood wheezing effectively
A large-scale study involving nearly 19,000 Italian children aged 6-7 years examined whether eating citrus fruits and kiwis—both rich in vitamin C—could reduce respiratory symptoms like wheezing and chronic cough. Parents reported their children's fruit intake and respiratory health through standardized questionnaires, with a subset of over 4,100 children followed up one year later.
The findings were striking: children eating vitamin C-rich fruit five to seven times weekly showed significantly lower rates of chronic cough compared to those eating it less than once weekly. Notably, even modest consumption of just one to two servings per week offered protective benefits. The effect was particularly pronounced among children with a history of asthma, with weekly fruit eaters experiencing less than half the wheezing incidents of infrequent consumers.
The findings were striking: children eating vitamin C-rich fruit five to seven times weekly showed significantly lower rates of chronic cough compared to those eating it less than once weekly. Notably, even modest consumption of just one to two servings per week offered protective benefits. The effect was particularly pronounced among children with a history of asthma, with weekly fruit eaters experiencing less than half the wheezing incidents of infrequent consumers.
Read More
User Reviews
USERS' SCORE
Good
Based on 3 Reviews
8.5
- All Reviews
- Positive Reviews
- Negative Reviews
9
Effective for health
4 people found this helpful
This is undoubtedly the best medicine! Admittedly, I lack the detailed knowledge of others who praised it, but I must share my experience. My husband became unwell with a temperature of 38.5 degrees, refusing to drink anything. After some persuasion, he tried the product, and by the evening, his fever had gone. By morning, he felt completely better with no lingering symptoms like a chronic cough. He was pleasantly surprised and now continues to take it willingly. We found the product to be effective and worth the investment, despite initial apprehensions about the price. I’ve even shared it with my family, as it seems to support our health significantly. Dosage varies per individual, but I know what works for us.
Read More
9
Cold treatment aid
An excellent aid for colds! Although vitamin C doses over 500 mg aren't typically absorbed, I find that taking 1 g during illness boosts my immune response. This vitamin should be a staple in every family's medicine cabinet. It not only shortens recovery time from colds but also makes their symptoms more manageable. Unlike regular vitamin C, which aggravates my chronic gastritis, this Ester-C variant doesn’t cause any discomfort. It's an effective antioxidant, strengthens blood vessels, and helps prevent cholesterol plaques. Trust me, this product is essential.
Read More
7.5
Sore throat relief
Very good vitamin C, which I've ordered a second time. My family and I drink it in autumn and spring. If I sense an illness coming, I start taking it, and symptoms usually recede quickly or don’t materialise at all. Previously, I suffered from a sore throat at the slightest cold due to my chronic tonsillitis, but since taking this vitamin, I’ve forgotten about the discomfort. It truly has been a game-changer in maintaining our health through seasonal changes.
Read More
Frequently Asked Questions
9
Effective for health
4 people found this helpful
This is undoubtedly the best medicine! Admittedly, I lack the detailed knowledge of others who praised it, but I must share my experience. My husband became unwell with a temperature of 38.5 degrees, refusing to drink anything. After some persuasion, he tried the product, and by the evening, his fever had gone. By morning, he felt completely better with no lingering symptoms like a chronic cough. He was pleasantly surprised and now continues to take it willingly. We found the product to be effective and worth the investment, despite initial apprehensions about the price. I’ve even shared it with my family, as it seems to support our health significantly. Dosage varies per individual, but I know what works for us.
7.5
Sore throat relief
Very good vitamin C, which I've ordered a second time. My family and I drink it in autumn and spring. If I sense an illness coming, I start taking it, and symptoms usually recede quickly or don’t materialise at all. Previously, I suffered from a sore throat at the slightest cold due to my chronic tonsillitis, but since taking this vitamin, I’ve forgotten about the discomfort. It truly has been a game-changer in maintaining our health through seasonal changes.
9
Cold treatment aid
An excellent aid for colds! Although vitamin C doses over 500 mg aren't typically absorbed, I find that taking 1 g during illness boosts my immune response. This vitamin should be a staple in every family's medicine cabinet. It not only shortens recovery time from colds but also makes their symptoms more manageable. Unlike regular vitamin C, which aggravates my chronic gastritis, this Ester-C variant doesn’t cause any discomfort. It's an effective antioxidant, strengthens blood vessels, and helps prevent cholesterol plaques. Trust me, this product is essential.
References
- Omenaas E, Fluge O, Buist AS, Vollmer WM, Gulsvik A. Dietary vitamin C intake is inversely related to cough and wheeze in young smokers. Respir Med. 2003;97:134. PubMed
- Forastiere F, Pistelli R, Sestini P, Fortes C, Renzoni E, et al. Consumption of fresh fruit rich in vitamin C and wheezing symptoms in children. SIDRIA Collaborative Group, Italy (Italian Studies on Respiratory Disorders in Children and the Environment). Thorax. 2000;55:283. PubMed
Data last updated:
