We examined the effects of vitamin C on pneumonia caused by the influenza virus, specifically the H1N1 strain, in mice under stress. The study found that when exposed to restraint stress, the mice experienced increased mortality and more severe pneumonia symptoms.
However, by giving them oral vitamin C at doses of 125 and 250 mg/kg, we observed a significant reduction in these severe outcomes. Vitamin C seemed to modulate the expression of certain genes related to the immune response, such as MAVS and IRF3, and increased the expression of NF-κB, which plays a key role in the body's antiviral defense.
Our research suggested that vitamin C's protective effects might stem from its ability to inhibit excess cortisol production in the adrenal gland, which is often elevated due to stress. By lowering cortisol levels, vitamin C may help reduce susceptibility to influenza infections, making it a potential ally during the flu season, especially for those experiencing stress.
Through these findings, we highlighted a new mechanism for how vitamin C can be beneficial during influenza infections, particularly for those who are feeling overwhelmed.
Read More
8
Vitamin C triterpene flu inhibitors
Design, synthesis and biological evaluation of novel L-ascorbic acid-conjugated pentacyclic triterpene derivatives as potential influenza virus entry inhibitors.
We recently explored the potential of novel compounds that are combinations of L-ascorbic acid, commonly known as vitamin C, and pentacyclic triterpenes in battling the flu. The study focused on compounds we created and tested against the influenza virus in MDCK cells, particularly looking at their effectiveness and any possible side effects.
Among all the compounds we evaluated, one stood out: the 2,3-O,O-dibenzyl-6-deoxy-L-ascorbic acid-betulinic acid conjugate. It displayed significant anti-influenza activity with an effective concentration (EC50) of just 8.7 μM and was not toxic to the cells used in our testing. This suggests that combining vitamin C with these triterpenes might enhance their ability to fight the flu virus, marking an exciting avenue for further research.
We also discovered that this particular compound acts early in the influenza lifecycle, interfering with the virus's ability to attach to cells. We confirmed this by observing that it inhibited the hemagglutination—a crucial step that allows the virus to spread. Our findings indicate that L-ascorbic acid-conjugated triterpenes hold promise as potential anti-influenza agents, specifically targeting viral entry and enhancing the effectiveness of treatment strategies.
Read More
4
Vitamin C shows moderate influenza inhibition
Five Novel Non-Sialic Acid-Like Scaffolds Inhibit In Vitro H1N1 and H5N2 Neuraminidase Activity of Influenza a Virus.
We investigated the effects of various compounds, including vitamin C, on the neuraminidase (NA) activity of influenza viruses, specifically H1N1 and H5N2. Neuraminidase is crucial for the virus as it helps release new viral particles from infected cells, making it a key target for antiviral treatments.
In this study, we focused on five different compounds that are structurally distinct from sialic acid, which is the natural substrate of neuraminidase. Among those tested, vitamin C was one of the compounds alongside others like acetyl phenylalanylmethionine and propanoic acid derivatives. We found that these compounds inhibited NA activity, but the degree of inhibition varied.
Notably, the inhibition we observed was in the millimolar range, which suggests that while there is some effect, the affinity of vitamin C to inhibit neuraminidase is moderate compared to the reference drug zanamivir. The IC values for the compounds ranged from 6.4 to 73 mM, indicating that they are not as potent as zanamivir.
Overall, our study presents vitamin C and other small organic molecules as potential lead compounds for developing new neuraminidase inhibitors, even if vitamin C’s impact on flu remains to be clarified as part of a broader analysis of multiple compounds.
Read More
Most Useful Reviews
10
Effective antioxidant
7 people found this helpful
Great product: Best Vitamin C Capsules. I have taken Solgar Vitamin C 1000 MG for years and find them effective. I haven't had a cold or flu in years since taking one capsule daily.
Read More
10
Long-term flu prevention
4 people found this helpful
I've taken this product for years, and it works. I haven't had a cold or flu in 25 years.
Read More
9
Cold and flu defence
2 people found this helpful
This product prevents me from getting many colds and flu. The Vitamin C is a solid defence against cold bugs and flu during this season.
We set out to discover how red ginseng and vitamin C work together to enhance immune cell function and fight off viral infections like the flu. In our investigation, we treated human immune cells and specific types of mice unable to produce vitamin C, looking closely at their reaction to influenza A virus/H1N1.
Our findings were quite promising. We observed that both red ginseng and vitamin C elevated the activation levels of immune cells, particularly T-cells and natural killer (NK) cells, known for their vital role in combating viruses. This combination not only helped boost immune cell activity but also reduced lung inflammation caused by the influenza virus, which is crucial for better survival rates during infections.
In cases where vitamin C levels were low in a specific mouse model, we noted that the added nutrients significantly improved their condition. They experienced reduced viral load and inflammation in their lungs after receiving red ginseng and vitamin C, compared to those without this supplementation. These insights suggest that while red ginseng and vitamin C collectively support immune health, the interplay of these substances can be crucial in managing flu infections effectively.
Read More
8
Vitamin C triterpene flu inhibitors
Design, synthesis and biological evaluation of novel L-ascorbic acid-conjugated pentacyclic triterpene derivatives as potential influenza virus entry inhibitors.
We recently explored the potential of novel compounds that are combinations of L-ascorbic acid, commonly known as vitamin C, and pentacyclic triterpenes in battling the flu. The study focused on compounds we created and tested against the influenza virus in MDCK cells, particularly looking at their effectiveness and any possible side effects.
Among all the compounds we evaluated, one stood out: the 2,3-O,O-dibenzyl-6-deoxy-L-ascorbic acid-betulinic acid conjugate. It displayed significant anti-influenza activity with an effective concentration (EC50) of just 8.7 μM and was not toxic to the cells used in our testing. This suggests that combining vitamin C with these triterpenes might enhance their ability to fight the flu virus, marking an exciting avenue for further research.
We also discovered that this particular compound acts early in the influenza lifecycle, interfering with the virus's ability to attach to cells. We confirmed this by observing that it inhibited the hemagglutination—a crucial step that allows the virus to spread. Our findings indicate that L-ascorbic acid-conjugated triterpenes hold promise as potential anti-influenza agents, specifically targeting viral entry and enhancing the effectiveness of treatment strategies.
Read More
8
Vitamin C mitigates flu pneumonia
A new mechanism of vitamin C effects on A/FM/1/47(H1N1) virus-induced pneumonia in restraint-stressed mice.
We examined the effects of vitamin C on pneumonia caused by the influenza virus, specifically the H1N1 strain, in mice under stress. The study found that when exposed to restraint stress, the mice experienced increased mortality and more severe pneumonia symptoms.
However, by giving them oral vitamin C at doses of 125 and 250 mg/kg, we observed a significant reduction in these severe outcomes. Vitamin C seemed to modulate the expression of certain genes related to the immune response, such as MAVS and IRF3, and increased the expression of NF-κB, which plays a key role in the body's antiviral defense.
Our research suggested that vitamin C's protective effects might stem from its ability to inhibit excess cortisol production in the adrenal gland, which is often elevated due to stress. By lowering cortisol levels, vitamin C may help reduce susceptibility to influenza infections, making it a potential ally during the flu season, especially for those experiencing stress.
Through these findings, we highlighted a new mechanism for how vitamin C can be beneficial during influenza infections, particularly for those who are feeling overwhelmed.
Read More
7
Vitamin C's promise against flu
Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis.
We examined how vitamin C supplementation can impact flu incidence and symptom duration. Our analysis of clinical studies indicated that vitamin C does show promise in reducing the risk of acute respiratory infections, including flu. Specifically, vitamin C reduced the likelihood of catching an acute respiratory infection by approximately 4% (risk ratio of 0.96).
Additionally, we observed that vitamin C also helps shorten the duration of flu symptoms by around 9%. This effect seemed to be more pronounced in men and people from middle-income countries, highlighting the complexity of health factors influenced by gender and socio-economic status.
Overall, while the findings suggest vitamin C can be a modicum of hope in managing flu symptoms, it isn't a standalone solution. Our results advocate for more research to fully understand the impact of vitamin C, especially in the context of the ongoing challenges posed by various respiratory viruses, including influenza.
Read More
4
Vitamin C shows moderate influenza inhibition
Five Novel Non-Sialic Acid-Like Scaffolds Inhibit In Vitro H1N1 and H5N2 Neuraminidase Activity of Influenza a Virus.
We investigated the effects of various compounds, including vitamin C, on the neuraminidase (NA) activity of influenza viruses, specifically H1N1 and H5N2. Neuraminidase is crucial for the virus as it helps release new viral particles from infected cells, making it a key target for antiviral treatments.
In this study, we focused on five different compounds that are structurally distinct from sialic acid, which is the natural substrate of neuraminidase. Among those tested, vitamin C was one of the compounds alongside others like acetyl phenylalanylmethionine and propanoic acid derivatives. We found that these compounds inhibited NA activity, but the degree of inhibition varied.
Notably, the inhibition we observed was in the millimolar range, which suggests that while there is some effect, the affinity of vitamin C to inhibit neuraminidase is moderate compared to the reference drug zanamivir. The IC values for the compounds ranged from 6.4 to 73 mM, indicating that they are not as potent as zanamivir.
Overall, our study presents vitamin C and other small organic molecules as potential lead compounds for developing new neuraminidase inhibitors, even if vitamin C’s impact on flu remains to be clarified as part of a broader analysis of multiple compounds.
Read More
User Reviews
USERS' SCORE
Good
Based on 30 Reviews
8.3
All Reviews
Positive Reviews
Negative Reviews
10
Effective antioxidant
7 people found this helpful
Great product: Best Vitamin C Capsules. I have taken Solgar Vitamin C 1000 MG for years and find them effective. I haven't had a cold or flu in years since taking one capsule daily.
Read More
10
Long-term flu prevention
4 people found this helpful
I've taken this product for years, and it works. I haven't had a cold or flu in 25 years.
Read More
9
Cold and flu defence
2 people found this helpful
This product prevents me from getting many colds and flu. The Vitamin C is a solid defence against cold bugs and flu during this season.
Read More
10
No flu
Magnificent product! Ever since I started taking it, I haven’t caught the flu and my immune system feels much healthier.
Read More
9
Strong defence
Vitamin C is a robust defence against influenza, particularly in these challenging times. It supports our immune system against viruses, and I always ensure I have it in my medicine cabinet.
The flu, short for influenza, is a contagious respiratory illness caused by influenza viruses. It affects the nose, throat, and sometimes the lungs, leading to a range of symptoms that can vary in severity. Common symptoms include fever, chills, muscle aches, cough, congestion, runny nose, headaches, and fatigue. The flu can lead to serious complications, particularly in vulnerable populations such as young children, the elderly, pregnant women, and those with underlying health conditions.
The flu virus spreads primarily through respiratory droplets when an infected person coughs, sneezes, or talks. It can also be transmitted by touching surfaces contaminated with the virus and then touching one's face. Vaccination is the most effective way to prevent the flu, and the vaccine is typically updated annually to provide protection against the most common circulating strains. In addition to vaccination, practicing good hygiene, such as frequent handwashing and respiratory etiquette, can help minimize the risk of infection.
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 is often touted as a remedy for the common cold and flu, but the scientific evidence supporting its effectiveness is mixed. Some studies suggest that taking Vitamin C may reduce the duration and severity of flu-like symptoms, particularly in people who are under physical stress, such as athletes. However, for the average person, the benefits of high-dose Vitamin C in preventing or treating the flu are not conclusively supported by research. It's generally recommended to maintain an adequate intake of Vitamin C as part of a balanced diet, but relying solely on supplements is not a guaranteed method for preventing the flu.
Incorporating Vitamin C-rich foods, such as citrus fruits, strawberries, and bell peppers, can support your immune system and overall health. It's important to note that while Vitamin C can contribute to your well-being, it should not replace conventional flu prevention measures, like vaccination and good hygiene practices. If you're already experiencing flu symptoms, it's advisable to consult with a healthcare professional for appropriate treatment options.
Based on user reviews, the time it takes to see results from vitamin C supplements for flu prevention can vary. Many users report feeling significant improvements within a day. For instance, one user mentions that they often feel better the very next day after increasing their vitamin intake when they start to feel unwell Read Review. Another reviewer states that they have noticed a reduction in flu infections and an overall stronger immune response shortly after starting to take the supplement Read Review.
However, other users recommend taking vitamin C over a longer period, suggesting that courses of 10-21 days can optimize immunity and manage cold symptoms effectively Read Review. It's important to note that individual responses may vary, but many affirm the efficacy of consistent use in preventing flu symptoms and bolstering defenses against infections.
Scientific research suggests that vitamin C may provide some support in managing flu symptoms, though it is not a standalone treatment. A study found that vitamin C supplementation could reduce the likelihood of contracting acute respiratory infections like the flu by about 4% and shorten the duration of flu symptoms by approximately 9% [1]. Additionally, it demonstrates promise in boosting immune responses and mitigating lung inflammation when combined with red ginseng [3].
Moreover, vitamin C has shown potential as part of a broader strategy against the virus itself, as it has been linked to inhibiting the neuraminidase activity of influenza viruses, contributing to a reduction in viral propagation [2]. Its effects appear more pronounced in specific conditions, such as stress, where it may help improve responses to H1N1 pneumonia [5]. Although results indicate that vitamin C could enhance immune function and perhaps decrease the severity of flu symptoms, more comprehensive studies are needed to fully validate its effectiveness in flu prevention and treatment.
Many users report experiencing significant improvements in their immune health after incorporating vitamin C into their routines. For example, one reviewer shared that since they started taking vitamin C, they haven't caught the flu and feel their immune system is much healthier Read Review. Similarly, another individual noted that they have not battled severe conditions for a long time and that any colds they do catch resolve much more quickly Read Review. This pattern of feedback highlights the potential of vitamin C to bolster immunity against viral infections, particularly during the winter months.
Additionally, there are multiple endorsements of the efficacy of vitamin C as a preventative measure against colds and flu-like symptoms. One user mentioned that they have gradually used vitamin C in their household during flu seasons, reporting positive health outcomes for their family Read Review. Moreover, many reviewers recommend taking vitamin C at the onset of any flu-like symptoms, suggesting that it often leads to quick relief or reduced severity of illness Read Review. It's essential to keep in mind that while these anecdotal experiences indicate a trend towards improved health outcomes, individual results may vary.
Based on user reviews, many individuals have reported positive experiences when combining vitamin C supplements with other remedies to manage flu symptoms. Users highlight the importance of taking vitamin C not only as a standalone supplement but also alongside other immune-boosting products. For instance, one user indicated that they gradually stock up on vitamin C during the flu season, noting it significantly aids in keeping their family healthy Read Review. Another reviewer mentioned that they found pairing vitamin C with food helps prevent stomach irritation, enhancing the overall effect of the supplement Read Review.
Furthermore, many users encourage starting vitamin C intake at the first signs of flu-like symptoms for the best results Read Review. They believe that this proactive approach, potentially combined with other supportive measures, leads to quicker recovery times and less severe symptoms. Overall, the consensus among users is that vitamin C works effectively when integrated into an overall strategy for fighting off colds and flu, particularly during the winter months.
Based on recent research, the optimal dose of Vitamin C for treating flu symptoms appears to vary, but there are notable findings worth mentioning. A study identified that administering Vitamin C at doses of 125 and 250 mg/kg in stressed mice significantly reduced pneumonia symptoms caused by the H1N1 strain of the influenza virus [5]. While direct translation to human dosage is not straightforward, this suggests that larger doses, within safe limits, could potentially offer some therapeutic benefits during flu infections.
Moreover, vitamin C has demonstrated effects in reducing the duration of flu symptoms by approximately 9%, indicating that regular supplementation can be beneficial for overall respiratory health [1]. While Vitamin C alone isn't a cure-all, these findings suggest it could serve as a valuable adjunct in flu management, especially when taken in higher doses. As always, consult with a healthcare provider before starting any new supplement regimen.
9
Improves condition
I actively began to strengthen my immunity during flu and cold seasons with Vitamin C from Solgar. The price was appealing; in a pharmacy, it’s much higher! When I start feeling unwell, I increase my vitamin intake, and the next day I often feel much better!
9
Increased flu resistance
I have noticed that since I began taking this brand of vitamin C, my body has become more resilient against flu infections. Curiously, my wife shares the same opinion. Highly recommended!!
7.5
Supports immunity
2 people found this helpful
Vitamin C has been a lifesaver for me over the last six months. I use it for immunity, which helps me manage colds that don't progress into the flu. It also strengthens my blood vessels and skin. I highly recommend taking courses of 1-2 capsules for 10-21 days!
10
No flu
Magnificent product! Ever since I started taking it, I haven’t caught the flu and my immune system feels much healthier.
7.5
Long-term immune support
I have relied on this product for years to boost my immune system, as I struggle with colds, flu, and various infections during winter. It has truly helped me, as I have not faced any severe conditions in a long while, and even if I catch a cold, it resolves much more quickly.
6
Family saves
What can I say about a vitamin from Solgar? It's fantastic! It saves my whole family during flu season; we all take one tablet every day.
7.5
Discomfort relief
I always recommend keeping vitamin C on hand. As soon as I feel discomfort similar to flu or ARVI, I start taking it, and typically the illness subsides.
7.5
Healthy for flu
1 people found this helpful
Absolutely fantastic! I am eager to sing Solgar's praises continually. We gradually stock up for autumn and winter. Last year, we used their family Vitamin C with rosehip at 250 mg, and we loved it. The 1000 mg is bound to keep us healthy during the flu and cold season. I recommend it to everyone, especially those who are often unwell!
7.5
Best for low immunity
Great quality. 1000 mg is highly recommended for those prone to flu and exposed to various viruses. For low immunity, it is best taken with food to prevent stomach irritation.
7
Vitamin C's promise against flu
Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis.
We examined how vitamin C supplementation can impact flu incidence and symptom duration. Our analysis of clinical studies indicated that vitamin C does show promise in reducing the risk of acute respiratory infections, including flu. Specifically, vitamin C reduced the likelihood of catching an acute respiratory infection by approximately 4% (risk ratio of 0.96).
Additionally, we observed that vitamin C also helps shorten the duration of flu symptoms by around 9%. This effect seemed to be more pronounced in men and people from middle-income countries, highlighting the complexity of health factors influenced by gender and socio-economic status.
Overall, while the findings suggest vitamin C can be a modicum of hope in managing flu symptoms, it isn't a standalone solution. Our results advocate for more research to fully understand the impact of vitamin C, especially in the context of the ongoing challenges posed by various respiratory viruses, including influenza.
9
Immune booster for flu treatment
Red ginseng and vitamin C increase immune cell activity and decrease lung inflammation induced by influenza A virus/H1N1 infection.
We set out to discover how red ginseng and vitamin C work together to enhance immune cell function and fight off viral infections like the flu. In our investigation, we treated human immune cells and specific types of mice unable to produce vitamin C, looking closely at their reaction to influenza A virus/H1N1.
Our findings were quite promising. We observed that both red ginseng and vitamin C elevated the activation levels of immune cells, particularly T-cells and natural killer (NK) cells, known for their vital role in combating viruses. This combination not only helped boost immune cell activity but also reduced lung inflammation caused by the influenza virus, which is crucial for better survival rates during infections.
In cases where vitamin C levels were low in a specific mouse model, we noted that the added nutrients significantly improved their condition. They experienced reduced viral load and inflammation in their lungs after receiving red ginseng and vitamin C, compared to those without this supplementation. These insights suggest that while red ginseng and vitamin C collectively support immune health, the interplay of these substances can be crucial in managing flu infections effectively.
4
Vitamin C shows moderate influenza inhibition
Five Novel Non-Sialic Acid-Like Scaffolds Inhibit In Vitro H1N1 and H5N2 Neuraminidase Activity of Influenza a Virus.
We investigated the effects of various compounds, including vitamin C, on the neuraminidase (NA) activity of influenza viruses, specifically H1N1 and H5N2. Neuraminidase is crucial for the virus as it helps release new viral particles from infected cells, making it a key target for antiviral treatments.
In this study, we focused on five different compounds that are structurally distinct from sialic acid, which is the natural substrate of neuraminidase. Among those tested, vitamin C was one of the compounds alongside others like acetyl phenylalanylmethionine and propanoic acid derivatives. We found that these compounds inhibited NA activity, but the degree of inhibition varied.
Notably, the inhibition we observed was in the millimolar range, which suggests that while there is some effect, the affinity of vitamin C to inhibit neuraminidase is moderate compared to the reference drug zanamivir. The IC values for the compounds ranged from 6.4 to 73 mM, indicating that they are not as potent as zanamivir.
Overall, our study presents vitamin C and other small organic molecules as potential lead compounds for developing new neuraminidase inhibitors, even if vitamin C’s impact on flu remains to be clarified as part of a broader analysis of multiple compounds.
8
Vitamin C mitigates flu pneumonia
A new mechanism of vitamin C effects on A/FM/1/47(H1N1) virus-induced pneumonia in restraint-stressed mice.
We examined the effects of vitamin C on pneumonia caused by the influenza virus, specifically the H1N1 strain, in mice under stress. The study found that when exposed to restraint stress, the mice experienced increased mortality and more severe pneumonia symptoms.
However, by giving them oral vitamin C at doses of 125 and 250 mg/kg, we observed a significant reduction in these severe outcomes. Vitamin C seemed to modulate the expression of certain genes related to the immune response, such as MAVS and IRF3, and increased the expression of NF-κB, which plays a key role in the body's antiviral defense.
Our research suggested that vitamin C's protective effects might stem from its ability to inhibit excess cortisol production in the adrenal gland, which is often elevated due to stress. By lowering cortisol levels, vitamin C may help reduce susceptibility to influenza infections, making it a potential ally during the flu season, especially for those experiencing stress.
Through these findings, we highlighted a new mechanism for how vitamin C can be beneficial during influenza infections, particularly for those who are feeling overwhelmed.
References
Abioye AI, Bromage S, Fawzi W. Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis. BMJ Glob Health. 2021;6. doi:10.1136/bmjgh-2020-003176
Márquez-Domínguez L, Reyes-Leyva J, Herrera-Camacho I, Santos-López G, Scior T. Five Novel Non-Sialic Acid-Like Scaffolds Inhibit In Vitro H1N1 and H5N2 Neuraminidase Activity of Influenza a Virus. Molecules. 2020;25. doi:10.3390/molecules25184248
Kim H, Jang M, Kim Y, Choi J, Jeon J, et al. Red ginseng and vitamin C increase immune cell activity and decrease lung inflammation induced by influenza A virus/H1N1 infection. J Pharm Pharmacol. 2016;68:406. doi:10.1111/jphp.12529
Wang H, Xu R, Shi Y, Si L, Jiao P, et al. Design, synthesis and biological evaluation of novel L-ascorbic acid-conjugated pentacyclic triterpene derivatives as potential influenza virus entry inhibitors. Eur J Med Chem. 2016;110:376. doi:10.1016/j.ejmech.2016.01.005
Cai Y, Li YF, Tang LP, Tsoi B, Chen M, et al. A new mechanism of vitamin C effects on A/FM/1/47(H1N1) virus-induced pneumonia in restraint-stressed mice. Biomed Res Int. 2015;2015:675149. doi:10.1155/2015/675149