Last update
3/18/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7
USERS' SCORE
Good
Based on 7 Reviews
8.5
Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Calories
5
Total Carbohydrate
1 g
<1%**
Vitamin C(as Ester C® calcium ascorbate)
1,000 mg
1,111%
Calcium(as Ester-C® calcium ascorbate)
100 mg
8%
Citrus BioflavonoidComplex
200 mg
***
Acerola Extract
25 mg
***
Rose Hips (fruit)
25 mg
***
Rutin
25 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
Relieves chronic cough
1 people found this helpful
Ester-C is reliable and gentle on the stomach. I regularly order it for my mum, who suffers from chronic gastritis and ulcers, as it helps her avoid irritation.
Read More
9
No irritation, effective
1 people found this helpful
Prior to discovering Ayherb, I was unaware of non-acidic vitamin C. I took 1000 mg every other day to boost my iron levels due to chronic anaemia. Unlike ascorbic acid, this form caused no gastrointestinal side effects and helped prevent colds effectively.
Read More
9
Immediate relief
1 people found this helpful
I've taken Ester-C plus 1000 mg for years. When I feel a sore throat or cough coming on, I start with one pill daily, which usually makes it go away immediately. If it persists, I increase to two or three pills.
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 7 Reviews
8.5
- All Reviews
- Positive Reviews
- Negative Reviews
9
Relieves chronic cough
1 people found this helpful
Ester-C is reliable and gentle on the stomach. I regularly order it for my mum, who suffers from chronic gastritis and ulcers, as it helps her avoid irritation.
Read More
9
No irritation, effective
1 people found this helpful
Prior to discovering Ayherb, I was unaware of non-acidic vitamin C. I took 1000 mg every other day to boost my iron levels due to chronic anaemia. Unlike ascorbic acid, this form caused no gastrointestinal side effects and helped prevent colds effectively.
Read More
9
Immediate relief
1 people found this helpful
I've taken Ester-C plus 1000 mg for years. When I feel a sore throat or cough coming on, I start with one pill daily, which usually makes it go away immediately. If it persists, I increase to two or three pills.
Read More
9
Highly effective
Excellent quality product that effectively prevents coughs and flu.
Read More
9
Increased activity
I bought this for a friend who often felt fatigued and had chronic coughs. After a month, he became more active and no longer suffers from coughs.
Read More
Frequently Asked Questions
9
Immediate relief
1 people found this helpful
I've taken Ester-C plus 1000 mg for years. When I feel a sore throat or cough coming on, I start with one pill daily, which usually makes it go away immediately. If it persists, I increase to two or three pills.
9
Increased activity
I bought this for a friend who often felt fatigued and had chronic coughs. After a month, he became more active and no longer suffers from coughs.
9
Preventive measure
I've taken Vitamin C consistently for years following severe herpes outbreaks. It effectively prevents my chronic cough and keeps my children healthy, with noticeable improvements in their overall immunity such that they rarely miss school. The combination of Vitamin C and zinc has worked wonders for us.
9
No irritation, effective
1 people found this helpful
Prior to discovering Ayherb, I was unaware of non-acidic vitamin C. I took 1000 mg every other day to boost my iron levels due to chronic anaemia. Unlike ascorbic acid, this form caused no gastrointestinal side effects and helped prevent colds effectively.
9
Relieves chronic cough
1 people found this helpful
Ester-C is reliable and gentle on the stomach. I regularly order it for my mum, who suffers from chronic gastritis and ulcers, as it helps her avoid irritation.
6
Ambulance for colds
Ester-C 1000 mg markedly improves symptoms of chronic cough and fatigue rapidly. However, I sometimes find it makes me overly energetic and inattentive, so I prefer a lower dose. Its effectiveness during flu was less noticeable, yet I still consider it vital for urgent situations.
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:
