Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8
USERS' SCORE
Good
Based on 181 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)
108 mg
8%
Citrus Bioflavonoids ComplexCitrus Bioflavonoids (Citrus spp.) (fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola, Rutin, Hesperidin Complex (Citrus spp.) (fruit), Naturally Occurring Vitamin C Metabolites
200 mg
**
Top Medical Research Studies
9
We investigated whether a daily vitamin C supplement could reduce the risk of catching colds. Over two months, 168 people took either the supplement or a placebo. Results showed that those taking vitamin C experienced significantly fewer colds and shorter durations of severe symptoms compared to the placebo group.
This supplement was well-tolerated with minimal side effects, and participants were notably satisfied with it. Overall, it seems that vitamin C may not only help prevent colds but also assist in faster recovery from them.
This supplement was well-tolerated with minimal side effects, and participants were notably satisfied with it. Overall, it seems that vitamin C may not only help prevent colds but also assist in faster recovery from them.
Read More
7
Vitamin C alleviates cold symptoms
We looked into how vitamin C affects cold symptoms through a well-structured study involving 622 volunteers divided into treatment groups. They received either vitamin C or a placebo over a 15-week period.
While both vitamin C groups experienced milder illnesses compared to the placebo group, there were no significant differences between the two forms of vitamin C used. Interestingly, those taking vitamin C spent about 25% fewer days sick indoors. This suggests that while vitamin C can alleviate some cold symptoms, we might not need as high a dose as previously thought.
While both vitamin C groups experienced milder illnesses compared to the placebo group, there were no significant differences between the two forms of vitamin C used. Interestingly, those taking vitamin C spent about 25% fewer days sick indoors. This suggests that while vitamin C can alleviate some cold symptoms, we might not need as high a dose as previously thought.
Read More
7
Effectiveness of Vitamin C on Colds
We explored the effects of vitamin C on the common cold and pneumonia by examining a range of studies. Interestingly, research on animals suggests that vitamin C may have protective effects against infections. However, when it comes to preventing colds in the general population, taking more than 1 gram of vitamin C per day didn’t show significant benefits.
But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.
Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.
Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.
Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.
Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
Read More
Most Useful Reviews
10
Cold relief in a day
210 people found this helpful
The quality is simply outstanding. As soon as a cold starts, I take these pills, and within a day, the cold disappears. Besides vitamin C, there's calcium, which is a bonus. The tablets are quite large, making them tough to swallow sometimes. This vitamin, at 1000 mg, fully meets my daily needs. My immunity skyrockets; just two packs a year suffice. The results are visible, and I haven’t fallen ill. I follow my doctor's advice for taking them.
Read More
9
Effective during colds
104 people found this helpful
Vitamin C with bioflavonoids is highly effective; during colds, I often feel back on my feet within three days.
Read More
9
Great for quick recovery
87 people found this helpful
This drug contains palmitic acid, plant flavonoids, calcium, rutin, and other essential trace elements. I typically take two dosages - 500 mg regularly and 1000 mg for colds and illnesses. I’m very pleased! It’s effective, and I seldom fall ill, recovering quickly!
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8
- All Researches
9
We investigated whether a daily vitamin C supplement could reduce the risk of catching colds. Over two months, 168 people took either the supplement or a placebo. Results showed that those taking vitamin C experienced significantly fewer colds and shorter durations of severe symptoms compared to the placebo group.
This supplement was well-tolerated with minimal side effects, and participants were notably satisfied with it. Overall, it seems that vitamin C may not only help prevent colds but also assist in faster recovery from them.
This supplement was well-tolerated with minimal side effects, and participants were notably satisfied with it. Overall, it seems that vitamin C may not only help prevent colds but also assist in faster recovery from them.
Read More
9
We explored the effects of ascorbic acid, commonly known as vitamin C, on cold tolerance in tomato seedlings. In our study, we discovered that applying vitamin C significantly boosts the seedlings' ability to handle cold stress.
By enhancing the antioxidant defense system, vitamin C treatment increased the enzyme activity in the seedlings' leaves. Additionally, it raised levels of important compounds such as proline, sugar, and abscisic acid, all of which play crucial roles in plant stress responses.
Our observations showed that vitamin C also protects the photosynthesis system of tomato seedlings. This implies that it helps maintain chlorophyll function, which is critical for the plant's overall health, especially under cold conditions.
Moreover, we found that vitamin C treatments led to increased expression of genes linked to antioxidant enzymes and cold response mechanisms. Overall, our findings suggest that exogenous vitamin C is a beneficial approach to improve cold tolerance in tomatoes and may provide helpful insights for farmers looking to cultivate hardier varieties during colder months.
By enhancing the antioxidant defense system, vitamin C treatment increased the enzyme activity in the seedlings' leaves. Additionally, it raised levels of important compounds such as proline, sugar, and abscisic acid, all of which play crucial roles in plant stress responses.
Our observations showed that vitamin C also protects the photosynthesis system of tomato seedlings. This implies that it helps maintain chlorophyll function, which is critical for the plant's overall health, especially under cold conditions.
Moreover, we found that vitamin C treatments led to increased expression of genes linked to antioxidant enzymes and cold response mechanisms. Overall, our findings suggest that exogenous vitamin C is a beneficial approach to improve cold tolerance in tomatoes and may provide helpful insights for farmers looking to cultivate hardier varieties during colder months.
Read More
7
Vitamin C alleviates cold symptoms
We looked into how vitamin C affects cold symptoms through a well-structured study involving 622 volunteers divided into treatment groups. They received either vitamin C or a placebo over a 15-week period.
While both vitamin C groups experienced milder illnesses compared to the placebo group, there were no significant differences between the two forms of vitamin C used. Interestingly, those taking vitamin C spent about 25% fewer days sick indoors. This suggests that while vitamin C can alleviate some cold symptoms, we might not need as high a dose as previously thought.
While both vitamin C groups experienced milder illnesses compared to the placebo group, there were no significant differences between the two forms of vitamin C used. Interestingly, those taking vitamin C spent about 25% fewer days sick indoors. This suggests that while vitamin C can alleviate some cold symptoms, we might not need as high a dose as previously thought.
Read More
7
Effectiveness of Vitamin C on Colds
We explored the effects of vitamin C on the common cold and pneumonia by examining a range of studies. Interestingly, research on animals suggests that vitamin C may have protective effects against infections. However, when it comes to preventing colds in the general population, taking more than 1 gram of vitamin C per day didn’t show significant benefits.
But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.
Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.
Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.
Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.
Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
Read More
User Reviews
USERS' SCORE
Good
Based on 181 Reviews
8.5
- All Reviews
- Positive Reviews
- Negative Reviews
10
Cold relief in a day
210 people found this helpful
The quality is simply outstanding. As soon as a cold starts, I take these pills, and within a day, the cold disappears. Besides vitamin C, there's calcium, which is a bonus. The tablets are quite large, making them tough to swallow sometimes. This vitamin, at 1000 mg, fully meets my daily needs. My immunity skyrockets; just two packs a year suffice. The results are visible, and I haven’t fallen ill. I follow my doctor's advice for taking them.
Read More
9
Effective during colds
104 people found this helpful
Vitamin C with bioflavonoids is highly effective; during colds, I often feel back on my feet within three days.
Read More
9
Great for quick recovery
87 people found this helpful
This drug contains palmitic acid, plant flavonoids, calcium, rutin, and other essential trace elements. I typically take two dosages - 500 mg regularly and 1000 mg for colds and illnesses. I’m very pleased! It’s effective, and I seldom fall ill, recovering quickly!
Read More
10
First aid for colds
6 people found this helpful
During the cold season, I always purchase this and recommend it to everyone for the first aid kit. At the first sign of a cold, I take it every three hours over three days.
Read More
9
Strengthens immunity
5 people found this helpful
The best vitamin C wonderfully alleviates cold symptoms and boosts immunity. Please rate my review, may God grant you happiness.
Read More
Frequently Asked Questions
10
Cold relief in a day
210 people found this helpful
The quality is simply outstanding. As soon as a cold starts, I take these pills, and within a day, the cold disappears. Besides vitamin C, there's calcium, which is a bonus. The tablets are quite large, making them tough to swallow sometimes. This vitamin, at 1000 mg, fully meets my daily needs. My immunity skyrockets; just two packs a year suffice. The results are visible, and I haven’t fallen ill. I follow my doctor's advice for taking them.
9
Effective during colds
104 people found this helpful
Vitamin C with bioflavonoids is highly effective; during colds, I often feel back on my feet within three days.
10
Seasonal saviour
4 people found this helpful
Great Vitamin C! It saved me during cold season—definitely a 5/5! People around me got sick, but I didn’t. At the first sign of a cold, I take 2 capsules, and it has consistently worked! They’re standard-sized capsules, easy to take, a must-have in every home.
9
Immunity boost
1 people found this helpful
This supplement helps maintain immunity excellently. After using it for five years, I’ve noticed I stopped getting colds, particularly in the cold seasons. I take it every day, and if I feel the onset of symptoms like a runny nose or sore throat, taking a pill helps prevent the disease from progressing. Its natural composition is impressive—I recommend it wholeheartedly!
10
Decreased symptoms significantly
1 people found this helpful
GREAT PRODUCT! This really works. I had a terrible cold and upped my intake to 3 per day (from 2), which decreased my symptoms exponentially.
7.5
Family remedy
1 people found this helpful
At the first sign of a cold, the whole family takes this in combination with D3 and zinc, and it really helps!
10
Fast results
Excellent vitamin C—it gets you back on your feet quickly. At the first sign of a cold, I take two capsules alongside D and zinc, and by the next day, the cold is gone.
9
We investigated whether a daily vitamin C supplement could reduce the risk of catching colds. Over two months, 168 people took either the supplement or a placebo. Results showed that those taking vitamin C experienced significantly fewer colds and shorter durations of severe symptoms compared to the placebo group.
This supplement was well-tolerated with minimal side effects, and participants were notably satisfied with it. Overall, it seems that vitamin C may not only help prevent colds but also assist in faster recovery from them.
This supplement was well-tolerated with minimal side effects, and participants were notably satisfied with it. Overall, it seems that vitamin C may not only help prevent colds but also assist in faster recovery from them.
7
Vitamin C alleviates cold symptoms
We looked into how vitamin C affects cold symptoms through a well-structured study involving 622 volunteers divided into treatment groups. They received either vitamin C or a placebo over a 15-week period.
While both vitamin C groups experienced milder illnesses compared to the placebo group, there were no significant differences between the two forms of vitamin C used. Interestingly, those taking vitamin C spent about 25% fewer days sick indoors. This suggests that while vitamin C can alleviate some cold symptoms, we might not need as high a dose as previously thought.
While both vitamin C groups experienced milder illnesses compared to the placebo group, there were no significant differences between the two forms of vitamin C used. Interestingly, those taking vitamin C spent about 25% fewer days sick indoors. This suggests that while vitamin C can alleviate some cold symptoms, we might not need as high a dose as previously thought.
7
Effectiveness of Vitamin C on Colds
We explored the effects of vitamin C on the common cold and pneumonia by examining a range of studies. Interestingly, research on animals suggests that vitamin C may have protective effects against infections. However, when it comes to preventing colds in the general population, taking more than 1 gram of vitamin C per day didn’t show significant benefits.
But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.
Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.
Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.
Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.
Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
References
- Van Straten M, Josling P. Preventing the common cold with a vitamin C supplement: a double-blind, placebo-controlled survey. Adv Ther. 2002;19:151.
- Anderson TW, Beaton GH, Corey P, Spero L. Winter illness and vitamin C: the effect of relatively low doses. Can Med Assoc J. 1975;112:823.
- Hemilä H, Chalker E. Vitamin C for the common cold and pneumonia. Pol Arch Intern Med. 2025;135. 10.20452/pamw.16926
- Wang X, Ran C, Fu Y, Han L, Yang X, et al. Application of Exogenous Ascorbic Acid Enhances Cold Tolerance in Tomato Seedlings through Molecular and Physiological Responses. Int J Mol Sci. 2024;25. 10.3390/ijms251810093
