Overview

SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Good
Based on 29 Reviews
8.8
Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Vitamin C (as L-ascorbic acid)
500 mg
556%
Rose Hips (Rosa canina) (fruit)
75 mg
**

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.
Read More
9
Vitamin C improves cold tolerance
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.
Read More

Most Useful Reviews

9.5
Quick cold relief
For a year now, my husband and I have been taking these vitamins. Our immunity and mood remain stable. When the first signs of a cold appear, we each take two pills, and after a few hours, everything clears up! We’ve tried it on friends, and they recovered just as quickly. We definitely recommend it.
Read More
10
Sinusitis relief
Excellent! The delivery was prompt, arriving within days. The tablets inside the bottle were intact. Since I began taking vitamin C over 20 years ago, the frequency of my colds has surprisingly decreased, and I've stopped suffering from sinusitis. My overall immune system has significantly improved.
Read More
9.5
Marked condition improvement
Fabulous! This drug’s convenient dosage and form ensure easy absorption without causing allergic reactions. It can be taken preventively, 1-2 tablets daily, or several times a day at the first signs of a cold. My condition improves markedly, helping my body to combat the illness.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
  • All Researches
9
Vitamin C improves cold tolerance
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.
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.
Read More

User Reviews

USERS' SCORE
Good
Based on 29 Reviews
8.8
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Quick cold relief
For a year now, my husband and I have been taking these vitamins. Our immunity and mood remain stable. When the first signs of a cold appear, we each take two pills, and after a few hours, everything clears up! We’ve tried it on friends, and they recovered just as quickly. We definitely recommend it.
Read More
10
Sinusitis relief
Excellent! The delivery was prompt, arriving within days. The tablets inside the bottle were intact. Since I began taking vitamin C over 20 years ago, the frequency of my colds has surprisingly decreased, and I've stopped suffering from sinusitis. My overall immune system has significantly improved.
Read More
9.5
Marked condition improvement
Fabulous! This drug’s convenient dosage and form ensure easy absorption without causing allergic reactions. It can be taken preventively, 1-2 tablets daily, or several times a day at the first signs of a cold. My condition improves markedly, helping my body to combat the illness.
Read More
9.5
Boosts immunity
The best vitamin C! It’s my favourite as I take it when autumn arrives and during colds. Combined with zinc, it provides excellent results. I purchase vitamin C from Solgar twice. They are the best manufacturer. Vitamin C enhances the immune system and restores energy during stress, mental, and physical strain.
Read More
9.5
Health protection
This vitamin has truly protected us. We took a course with the entire family and for the first time in many years, no one has fallen ill with colds, viral, or infectious diseases. Previously, we all got sick at least once a year.
Read More

Frequently Asked Questions

Cold is a term that refers to a state of low temperature, often associated with a perceptibly chilly environment or the sensation of being cool to the touch. Scientifically, cold is relative to the presence and movement of heat, which is a measure of energy within matter. In everyday terms, we experience cold through weather changes, such as during winter months, and it can also be described in the context of specific temperature ranges – for example, temperatures below 32 degrees Fahrenheit (0 degrees Celsius) generally signify freezing conditions, which can impact outdoor activities, personal comfort, and various ecological systems.

Moreover, the sensation of cold is not solely dependent on temperature; factors like humidity and wind chill can enhance the feeling of coldness. When discussing cold in terms of human health, prolonged exposure to cold conditions can lead to hypothermia or frostbite if body heat is not effectively maintained. Hence, it's crucial to dress appropriately and take necessary precautions during colder months to prevent adverse effects. Understanding the concept of cold can help individuals better prepare for seasonal changes and ensure their comfort and safety.

Vitamin C, also known as ascorbic acid, is a water-soluble vitamin that plays a critical role in numerous bodily functions. As an essential nutrient, it contributes to the growth and repair of tissues in the body, and it is vital for the production of collagen, an important protein that helps maintain skin, cartilage, tendons, ligaments, and blood vessels. Additionally, Vitamin C acts as a powerful antioxidant, which means it helps combat free radicals—unstable molecules that can cause oxidative stress and contribute to various chronic diseases.

Moreover, Vitamin C enhances iron absorption from plant-based foods, making it a vital component for those following vegetarian or vegan diets. While many people get sufficient Vitamin C from a well-balanced diet that includes fruits and vegetables like oranges, strawberries, kiwi, broccoli, and bell peppers, some individuals might require supplementation. It's generally recommended to stay within the daily intake guidelines, as excessive consumption can lead to gastrointestinal disturbances. Overall, Vitamin C is not just a skincare celebrity—it's a fundamental part of maintaining overall health and well-being.

Vitamin C has long been touted as a potential remedy for the common cold, but the evidence regarding its effectiveness is mixed. Several studies suggest that while vitamin C does not necessarily prevent colds, it may reduce the severity and duration of symptoms if taken at the onset of illness or during periods of high stress. For instance, a review published in the Cochrane Database indicated that regular intake of vitamin C might shorten the duration of colds by about a day, especially in individuals under physical stress, like athletes.

It's important to note that while vitamin C can be beneficial, it should not be viewed as a cure-all. Maintaining a balanced diet with adequate vitamin C through fruits and vegetables, such as citrus fruits, strawberries, and bell peppers, is recommended for overall immune support. If you are considering taking vitamin C supplements specifically to combat cold symptoms, consulting with a healthcare professional is advised to determine the appropriate dosage and to ensure that it aligns with your health needs.

When it comes to the effectiveness of vitamin C supplements for alleviating cold symptoms, user reviews suggest that many individuals experience noticeable improvements soon after taking the supplement. For instance, one user reports that taking two pills at the onset of a cold leads to clear symptoms within just a few hours (Read Review). Others echo similar sentiments, with comments highlighting marked improvements when taken at the first signs of illness (Read Review).

Furthermore, several reviews indicate that consistent use can bolster immune function, leading to a reduction in the frequency of colds over time. One user mentions a significant decrease in cold occurrences since beginning their supplementation, suggesting that regular intake may enhance long-term immunity (Read Review). Overall, while individual experiences may vary, many users report rapid benefits during cold episodes, often feeling better within hours of increasing their dosage.

Vitamin C, widely recognized for its potential health benefits, has garnered attention in its role in managing the common cold. Research suggests that while the general population may not experience significant benefits from taking more than 1 gram of vitamin C daily to prevent colds, athletes engaged in intense physical activity could see their cold incidence cut in half with supplementation. Furthermore, regular intake of 1 gram or more daily has been associated with a 15% reduction in cold severity, and larger doses (6-8 grams per day) have shown promise in shortening the duration of colds compared to lower doses [1]. This highlights that while Vitamin C may not be a foolproof solution for everyone, it could be worthwhile to consider higher doses, particularly during colder seasons or for those with increased susceptibility.

On the other hand, the other study examining Vitamin C focused on its role in boosting cold tolerance in tomato seedlings, showcasing its applications in agriculture rather than human health [2]. This reinforces the idea that Vitamin C plays a vital role across various biological functions, but in the context of alleviating common cold symptoms and its effectiveness in humans, the previous findings hold more relevance. Overall, the evidence points toward Vitamin C as a potentially beneficial supplement for managing cold symptoms, particularly at higher doses and in specific populations.

Based on user reviews, many individuals have reported significant improvements in their symptoms and overall well-being after taking vitamin C supplements. For instance, several users mention that taking the supplements at the onset of a cold can lead to marked relief within just a few hours, highlighting a sense of quick recovery from cold symptoms after increasing their dosage (Read Review). It is noted that consistent use tends to enhance overall immune health, with one long-term user stating a clear reduction in cold frequency over the years (Read Review).

Moreover, testimonials emphasize that vitamin C not only aids in alleviating cold symptoms promptly but may also bolster the immune system against future illnesses. Many users report feeling better equipped to handle colds, with one family noting that none fell ill during a season when they regularly took the supplement (Read Review). It's important to remember that while these experiences can be encouraging, individual results can vary significantly depending on personal health and circumstances.

Based on user reviews, many individuals report positive experiences when combining vitamin C supplements with other supportive nutrients like zinc. One user specifically notes that while taking vitamin C, combining it with zinc has yielded excellent results for managing cold symptoms, enhancing overall immune support during the cold season (Read Review). This sentiment is echoed by others who suggest that these complementary combinations not only help alleviate cold symptoms but may also boost immune function overall.

Additionally, users highlight the efficacy of vitamin C itself when increased at the first signs of illness, with many advocating for its use as a preventive measure during colder months. Reviews emphasize that quick administration—possibly combined with other vitamins or herbal extracts like rose hips—contributes to a faster recovery from colds, offering both immediate symptom relief and long-term immunity benefits (Read Review). Overall, the collective feedback suggests that users find value in strategic combinations, reinforcing vitamin C's role as an essential supplement in their cold management toolkit.

According to research, the optimal dose of Vitamin C for treating the common cold appears to be in the range of 6 to 8 grams per day. In a comprehensive analysis, it was found that while taking more than 1 gram daily did not significantly prevent colds for the general population, those engaged in intense physical activities saw a reduction in cold incidence when they took Vitamin C supplements. Moreover, regular consumption of at least 1 gram per day was associated with a 15% decrease in the severity of colds [1].

Interestingly, when Vitamin C was administered after cold symptoms emerged, studies indicated that higher doses (between 6 to 8 grams daily) could effectively shorten the duration of the illness compared to lower amounts [1]. This suggests that while typical doses might not have a major preventative effect, higher therapeutic doses could offer some relief when it comes to managing cold symptoms and their duration. Given its affordability and safety, increasing the intake of Vitamin C to these levels might be beneficial for those looking for additional support during cold season.

9.5
Quick cold relief
For a year now, my husband and I have been taking these vitamins. Our immunity and mood remain stable. When the first signs of a cold appear, we each take two pills, and after a few hours, everything clears up! We’ve tried it on friends, and they recovered just as quickly. We definitely recommend it.
8.3
Effective prevention
These are excellent. They combine quality with high potency at a good price. Each tablet contains 1000 mg, making them slightly large but manageable. They are beneficial to take as soon as you start feeling unwell, making you feel considerably better when colds or viruses strike, if taken promptly.
10
Sinusitis relief
Excellent! The delivery was prompt, arriving within days. The tablets inside the bottle were intact. Since I began taking vitamin C over 20 years ago, the frequency of my colds has surprisingly decreased, and I've stopped suffering from sinusitis. My overall immune system has significantly improved.
9.5
Health protection
This vitamin has truly protected us. We took a course with the entire family and for the first time in many years, no one has fallen ill with colds, viral, or infectious diseases. Previously, we all got sick at least once a year.
9.5
Boosts immunity
The best vitamin C! It’s my favourite as I take it when autumn arrives and during colds. Combined with zinc, it provides excellent results. I purchase vitamin C from Solgar twice. They are the best manufacturer. Vitamin C enhances the immune system and restores energy during stress, mental, and physical strain.
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.
9
Vitamin C improves cold tolerance
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.

References

  1. Hemilä H, Chalker E. Vitamin C for the common cold and pneumonia. Pol Arch Intern Med. 2025;135. doi:10.20452/pamw.16926
  2. 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. doi:10.3390/ijms251810093
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