Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Good
Based on 10 Reviews
8.5
Top Medical Research Studies
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
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
Most Useful Reviews
9
Boosts immune response
8 people found this helpful
Improves my Crohn's immune system significantly. Having Crohn's, my medications leave me with a weakened immune system. While kids quickly recover from a cold, I would suffer for a month or more. Since I started taking these supplements without any other immune boosters or multivitamins, I've felt much better. I no longer fall ill as often and recover faster. I'm quite impressed, though they are rather large pills. There's no flavour to rate, and I gave the ease of swallowing three stars as they're quite sizeable, but I'm accustomed to taking pills now.
Read More
9
Avoided colds, miracle effect
5 people found this helpful
I switched to a generic store brand for a while, and I got sick after two years of being well. The only thing that changed was that I ran out of this Vitamin C. About a few years ago, I discovered Ester-C, and after taking it for six months, I realised I hadn't had a cold sore. I suffered from cold sores for years, and it was humiliating. I felt cured of a terminal disease, enjoying life without hiding. I even noticed fewer allergy and cold symptoms. Although I recently had a severe flu, I was grateful the cold sore didn't develop. Vitamin C might be assisting me uniquely, but it’s worth a try.
Read More
10
Stops cold effectively
1 people found this helpful
Best way to stop a cold/fever. When I start feeling unwell, I take these vitamins along with plenty of orange juice, and it usually prevents me from getting ill. The only time it didn't work was when I ran out and had to wait two days for a new supply. I kept procrastinating the purchase, which was my fault. In my opinion, this is the best way to stop a cold/fever! It also worked for my husband during our honeymoon when he felt ill. We tried a different brand of vitamin C that was less effective for him; still, it ultimately helped but took longer. These will always be my top choice. I only take them when I start to feel sick.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
- All Researches
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
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 10 Reviews
8.5
- All Reviews
- Positive Reviews
- Negative Reviews
9
Boosts immune response
8 people found this helpful
Improves my Crohn's immune system significantly. Having Crohn's, my medications leave me with a weakened immune system. While kids quickly recover from a cold, I would suffer for a month or more. Since I started taking these supplements without any other immune boosters or multivitamins, I've felt much better. I no longer fall ill as often and recover faster. I'm quite impressed, though they are rather large pills. There's no flavour to rate, and I gave the ease of swallowing three stars as they're quite sizeable, but I'm accustomed to taking pills now.
Read More
9
Avoided colds, miracle effect
5 people found this helpful
I switched to a generic store brand for a while, and I got sick after two years of being well. The only thing that changed was that I ran out of this Vitamin C. About a few years ago, I discovered Ester-C, and after taking it for six months, I realised I hadn't had a cold sore. I suffered from cold sores for years, and it was humiliating. I felt cured of a terminal disease, enjoying life without hiding. I even noticed fewer allergy and cold symptoms. Although I recently had a severe flu, I was grateful the cold sore didn't develop. Vitamin C might be assisting me uniquely, but it’s worth a try.
Read More
10
Stops cold effectively
1 people found this helpful
Best way to stop a cold/fever. When I start feeling unwell, I take these vitamins along with plenty of orange juice, and it usually prevents me from getting ill. The only time it didn't work was when I ran out and had to wait two days for a new supply. I kept procrastinating the purchase, which was my fault. In my opinion, this is the best way to stop a cold/fever! It also worked for my husband during our honeymoon when he felt ill. We tried a different brand of vitamin C that was less effective for him; still, it ultimately helped but took longer. These will always be my top choice. I only take them when I start to feel sick.
Read More
9
Quick relief from cold
8 people found this helpful
Quality Vitamin C! I usually take 1-2 daily and up to 6 at the first sign of a cold. They swiftly tackle cold or flu viruses and are gentle on my stomach. I've taken them for years without issues. The larger 1000 mg tablets can be hard to swallow; it's better to take them with bread rather than just water. The outer coating dissolves quickly in water, so don’t get it lodged in your throat! They also come in smaller 500 mg versions which are easier to swallow. Overall, a superb Vitamin C!
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9
Effective against colds
2 people found this helpful
Works brilliantly! Our family has been using this, and it really works! When you start to feel the common cold symptoms, taking one daily will make a noticeable difference. I love them!
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Frequently Asked Questions
No FAQs are available for this product and symptom.
References
- 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
