We explored the potential benefits of vitamin D supplementation for reducing the risk of influenza infections. Through a comprehensive analysis of multiple Randomized Controlled Trials (RCTs), we aimed to clarify whether taking vitamin D can help prevent the flu.
Our investigation identified 10 relevant trials that included a total of 4,859 participants. These studies varied in their dosages and duration of vitamin D use, allowing us to assess overall effectiveness across different populations.
The findings were encouraging: our analysis demonstrated that vitamin D supplementation appears to significantly reduce the risk of getting influenza, suggesting that those who increase their vitamin D intake might be better protected during flu season.
Importantly, we did not find significant differences between the studies that could affect our result, and there was no hint of publication bias. Consequently, we can confidently suggest that including vitamin D in our health strategies could enhance our defenses against the flu.
Read More
8
Vitamin D3 reduces flu-like illnesses
Vitamin D3 Supplementation at 5000 IU Daily for the Prevention of Influenza-like Illness in Healthcare Workers: A Pragmatic Randomized Clinical Trial.
We conducted a practical study to investigate how daily vitamin D3 supplementation at 5000 IU might help reduce flu-like illnesses in healthcare workers. This was especially important during the COVID-19 pandemic, where preventing viral infections is crucial for those on the front lines.
Our study involved 255 healthcare workers who received the vitamin D3 supplement for at least two months and compared them to a control group of 2827 workers who did not receive the supplement. We asked participants to monitor themselves for any flu-like symptoms and report for COVID-19 testing accordingly.
The results were promising; those supplementing with vitamin D experienced a significant reduction in the incidence of flu-like illnesses. The numbers showed a noteworthy drop in non-COVID-19 flu-like illness rates among those taking the supplement. However, when it came to COVID-19 related flu-like illnesses, the difference was not statistically significant.
Overall, our exploration of vitamin D3's effects suggests that it may be a beneficial addition to the health routines of healthcare workers to stave off flu-like illnesses, although its influence on COVID-19 specifically requires further investigation.
We investigated the intriguing link between sunlight exposure, vitamin D production, and flu incidence. The study revealed that higher levels of sunlight are associated with a noticeable decrease in flu cases, particularly during the severe H1N1 epidemic in the fall of 2009.
Our findings indicate that a 10% increase in relative sunlight can lower the flu index during September and October by about 1.1 points on a 10-point scale. This layer of sunlight acts like a shield, helping protect individuals from catching the flu, thanks in part to its role in vitamin D production in our bodies.
A complementary study in New York State backed up these observations, reinforcing the message that adequate sunlight might be key in reducing flu incidence.
Read More
Most Useful Reviews
9
Migraines ceased
1 people found this helpful
¡Excelente! For years I suffered from migraines, believed to be due to low zinc during ovulation and menstruation. I took calcium, magnesium, and zinc at 100%. My migraines stopped. If I felt a migraine brewing, I took two. My doctor thought I was crazy, but he later acknowledged it could be hormonal. For 10 years, I took this until menopause. Now, I use it to keep my bones healthy and strengthen my body against colds and flu. After mistakenly buying a lower strength, my migraines returned, confirming its effectiveness.
Read More
10
Never sick again
I never get sick anymore after consuming this vitamin—no flu or cough. Thanks!
Read More
10
Immune support
A very good complex of Mg, Zn, and D3! I’ve repurchased it for my mum, and she really liked it, finding it effective for strengthening her immune system. During the Covid quarantine, my mum continued to work and thankfully avoided catching the virus, flu, or cold. I highly recommend this product.
We recently examined how vitamin D impacts our body's response to influenza H1N1, an important viral infection. Utilizing 142 clinical cases from the Department of Otolaryngology at Sun Yat-sen University, we dug into the effects of vitamin D deficiency on chronic rhinosinusitis (CRS), a condition that frequently involves damage to the airway's lining. By studying airway organoids treated with vitamin D, we were able to simulate how this treatment might bolster our defenses against flu viruses and bacteria like Staphylococcus aureus.
Our observations showed that many patients with CRS suffered from vitamin D deficiency. Notably, those who received vitamin D treatment exhibited faster cell growth in the nasal epithelium. When exposed to the H1N1 virus, these treated organoids demonstrated a remarkable ability to fend off the infection better than those without vitamin D. This protection stemmed from enhancements in host defenses, including improved production of antimicrobial proteins, reduced inflammation, and better epithelial integrity—crucial factors in fighting off infections.
We also uncovered some fascinating insights about the biological mechanisms at work. Vitamin D seemed to actively influence how epithelial cells develop and repair themselves while managing immune responses against infections. These findings underscore the significance of addressing vitamin D deficiency, especially for those vulnerable to respiratory illnesses.
Read More
9
Zinc and flavonoids combat flu
Inhibition of Respiratory RNA Viruses by a Composition of Ionophoric Polyphenols with Metal Ions.
We investigated the potential of zinc in combination with herbal polyphenols and copper to reduce the infectivity of respiratory RNA viruses, including the flu. This study is particularly timely due to the ongoing challenges posed by viruses like SARS-CoV-2, highlighting the need for effective therapeutic solutions.
Zinc ions are known to play a role in modulating viral RNA replication, which makes them an appealing option for decreasing viral loads and infectivity. However, a significant challenge is that the natural concentration of zinc in our cells is often too low for effective results. To tackle this, we combined zinc picolinate, a form of zinc that’s easier for the body to absorb, with a range of flavonoids—natural compounds renowned for their antioxidant properties and existing antiviral effects.
We ensured that these combinations were safe by assessing their impact on cultured cells, confirming that they didn’t harm cell viability. When tested further, our results revealed an impressive 50-95% reduction in viral genome replication levels across a variety of respiratory RNA viruses, including the flu virus, which suggests that this combination therapy could be promising in the fight against such illnesses.
Overall, our findings highlight an innovative approach to treating viral infections that is non-toxic, derived from nature, and may remain effective against emerging viral strains.
Read More
8
Vitamin D may reduce flu risk
The effectiveness of interventions to reduce the transmission of acute respiratory infections in care homes: a systematic review.
We explored how vitamin D supplementation might help reduce the risk of respiratory infections, particularly the flu, in care homes. Our systematic review of several randomized controlled trials focused on interventions to reduce the transmission of acute respiratory infections, looking beyond just vaccines.
Our findings highlighted that high-dose vitamin D supplementation led to a significant decrease in the incidence of acute respiratory infections, reducing the likelihood of getting sick. Specifically, one trial indicated a 40% reduction in these infections among participants receiving vitamin D compared to those who did not.
However, not all studies we reviewed showed compelling results for related supplements like vitamins, minerals, probiotics, and herbal aids, which did not significantly impact infection rates. This means that while vitamin D supplementation shows promise, more research is needed to fully understand its effects and confirm its benefits in combating flu and other respiratory illnesses.
Read More
8
Vitamin D3 reduces flu-like illnesses
Vitamin D3 Supplementation at 5000 IU Daily for the Prevention of Influenza-like Illness in Healthcare Workers: A Pragmatic Randomized Clinical Trial.
We conducted a practical study to investigate how daily vitamin D3 supplementation at 5000 IU might help reduce flu-like illnesses in healthcare workers. This was especially important during the COVID-19 pandemic, where preventing viral infections is crucial for those on the front lines.
Our study involved 255 healthcare workers who received the vitamin D3 supplement for at least two months and compared them to a control group of 2827 workers who did not receive the supplement. We asked participants to monitor themselves for any flu-like symptoms and report for COVID-19 testing accordingly.
The results were promising; those supplementing with vitamin D experienced a significant reduction in the incidence of flu-like illnesses. The numbers showed a noteworthy drop in non-COVID-19 flu-like illness rates among those taking the supplement. However, when it came to COVID-19 related flu-like illnesses, the difference was not statistically significant.
Overall, our exploration of vitamin D3's effects suggests that it may be a beneficial addition to the health routines of healthcare workers to stave off flu-like illnesses, although its influence on COVID-19 specifically requires further investigation.
Read More
8
Vitamin D reduces flu risk
Association Between Vitamin D and Influenza: Meta-Analysis and Systematic Review of Randomized Controlled Trials.
We explored the potential benefits of vitamin D supplementation for reducing the risk of influenza infections. Through a comprehensive analysis of multiple Randomized Controlled Trials (RCTs), we aimed to clarify whether taking vitamin D can help prevent the flu.
Our investigation identified 10 relevant trials that included a total of 4,859 participants. These studies varied in their dosages and duration of vitamin D use, allowing us to assess overall effectiveness across different populations.
The findings were encouraging: our analysis demonstrated that vitamin D supplementation appears to significantly reduce the risk of getting influenza, suggesting that those who increase their vitamin D intake might be better protected during flu season.
Importantly, we did not find significant differences between the studies that could affect our result, and there was no hint of publication bias. Consequently, we can confidently suggest that including vitamin D in our health strategies could enhance our defenses against the flu.
¡Excelente! For years I suffered from migraines, believed to be due to low zinc during ovulation and menstruation. I took calcium, magnesium, and zinc at 100%. My migraines stopped. If I felt a migraine brewing, I took two. My doctor thought I was crazy, but he later acknowledged it could be hormonal. For 10 years, I took this until menopause. Now, I use it to keep my bones healthy and strengthen my body against colds and flu. After mistakenly buying a lower strength, my migraines returned, confirming its effectiveness.
Read More
10
Never sick again
I never get sick anymore after consuming this vitamin—no flu or cough. Thanks!
Read More
10
Immune support
A very good complex of Mg, Zn, and D3! I’ve repurchased it for my mum, and she really liked it, finding it effective for strengthening her immune system. During the Covid quarantine, my mum continued to work and thankfully avoided catching the virus, flu, or cold. I highly recommend this product.
Read More
9
Migraine relief
Just MAGIC! For years, I suffered from severe migraines until my doctor prescribed Ca Mg Zn. I started taking it daily, and my migraines vanished. If I sensed a migraine coming, I would take two and avoid the discomfort. After 10 years, my migraines finally went away. Now, I use it to maintain healthy bones and strengthen my body against colds and flu, ensuring my blood levels stay normal. I know it helped with my migraines because I once bought a lower strength and they returned. When I got the right strength, they disappeared again. Highly recommended!
Read More
9
Effective protection
A fantastic immune booster! My family and I have used this product for two years, and it has greatly helped us stay protected from colds, flu, and even Covid-19! There are no side effects, and it genuinely boosts our immune health!
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.
Calcium is a chemical element represented by the symbol Ca and atomic number 20. It is an essential mineral in the body, playing a critical role in various physiological processes. As one of the most abundant elements in nature, calcium is particularly vital for maintaining strong bones and teeth, where about 99% of the body's calcium is stored. Beyond its structural function, calcium is crucial in muscle contraction, blood clotting, and nerve transmission, making it a key player in overall health.
Dietary sources of calcium include dairy products such as milk, yogurt, and cheese, as well as leafy green vegetables, nuts, seeds, and fortified foods. The recommended daily intake of calcium varies by age and sex, but generally, adults should aim for approximately 1,000 mg per day. For those who may struggle to meet their needs through diet alone, calcium supplements are available but should be taken with caution. It's essential to consult with a healthcare provider before starting any supplement regimen to avoid potential side effects or interactions with medications.
Based on user reviews, the time it typically takes to see results from taking this supplement varies, but many users report feeling improvements relatively quickly. For instance, one user noted that they experienced a return of smell within 10 days after starting supplementation Read Review. Others have mentioned that they felt stronger immune support and reduced instances of flu after consistent use over periods ranging from a few weeks to two years Read Review, Read Review.
Overall, while some users report immediate benefits like reduced symptoms or avoidance of illness shortly after beginning supplementation Read Review, others may need to take the supplement consistently over a longer period to experience its full benefits, particularly for ongoing immune support during flu season Read Review.
Research supports the potential benefits of vitamin D in reducing the risk and severity of flu infections. Several studies have explored its impact on respiratory infections, including the flu. For instance, a systematic review revealed that high-dose vitamin D supplementation could lead to a significant reduction in acute respiratory infections, including flu, suggesting that those who increase their vitamin D intake might be better protected during flu season [6]. Another study reported an impressive 84% reduction in the risk of flu among children taking vitamin D, although the results were not statistically significant [5].
Moreover, vitamin D appears to bolster the body’s defenses against influenza by enhancing immune responses, reducing inflammation, and supporting tissue repair [2]. However, it's noteworthy that not every research project showed significant effects of vitamin D on flu prevention, and some studies highlighted the necessity for more targeted research to fully understand this relationship [3]. Overall, while there is promising evidence for vitamin D's role in flu protection, more comprehensive studies are required to confirm these findings and establish clear guidelines for supplementation.
Based on user reviews, many individuals have reported significant improvements in their symptoms after taking this supplement. A number of users experiencing chronic migraines noted that supplementing with calcium, magnesium, and zinc led to the cessation of their migraine episodes. For instance, one user highlighted that their migraines vanished after consistent use, and returning to a lower strength product resulted in a resurgence of symptoms, thus reinforcing the supplement's effectiveness for them Read ReviewRead Review.
Additionally, several users attributed enhanced immune support to their supplementation regimen, citing a marked decrease in illnesses such as colds and flu. For example, one reviewer emphasized that their family experienced no symptoms of flu or cough after regular use, while another noted a significant improvement in overall immunity, stating they had not caught a cold for years Read ReviewRead Review. These anecdotal experiences suggest that while individual results may vary, many users have found this supplement beneficial for both migraine relief and immune system support.
Based on user reviews, many individuals have reported positive experiences when combining this supplement with other vitamins for flu management. Several users specifically mentioned mixing it with vitamin C to enhance its effectiveness in preventing colds and flu symptoms. For instance, one user indicated that they found it effective when taken alongside vitamin C whenever they felt unwell, which helped them avoid illness Read Review. Another user noted periodic supplementation of the product with vitamin C during flu season also contributed to satisfactory results Read Review.
Additionally, users have expressed confidence in the immune-boosting properties of the supplement alone or in combination with other vitamins, noting substantial improvements in their overall immunity and a significant reduction in flu occurrences within their families Read Review. This anecdotal evidence suggests that users feel the supplement provides comprehensive immune support, particularly when paired with other essential vitamins, making it a popular choice during flu season Read Review.
Based on user reviews, it appears that there is no specific consensus on the precise dosage of calcium for treating flu symptoms. However, many users emphasize the importance of combining calcium with other nutrients like magnesium and zinc for optimal immune support. One user noted that taking calcium, magnesium, and zinc at full strength helped alleviate their migraines and strengthen their body against colds and flu, suggesting they took these supplements regularly during flu season Read Review. Another review highlighted the effectiveness of their multivitamin regimen, particularly during periods of heightened flu activity, recommending that such combinations be taken at least twice a year Read Review.
Moreover, several users reported significant boosts in immune health after incorporating calcium, magnesium, and zinc into their diet, often recommending these complexes for flu prevention Read ReviewRead Review. While they did not mention exact dosages, the general sentiment suggests a consistent intake of these supplements during flu season could enhance overall immunity, helping to ward off viruses effectively.
6
Smell recovery
I lost my sense of smell due to Covid, and my friend suggested zinc supplementation. This was the only option available, and I found it beneficial with magnesium and calcium. It helped my sense of smell return faster than my friends who took other brands. After 10 days, I began to smell again. I will continue to use it whenever I have a cold or flu.
6
Supports immune system
My husband and I have been taking this product for three weeks and are already pleased. I appreciate the composition as I need calcium for my spine, magnesium for restful sleep, and zinc, of course, to support my body during the flu season. Vitamin D supports my immune system and cardiovascular health. At 51, I recently had a mild infection, but overall, I am satisfied with the results.
9
Effective protection
A fantastic immune booster! My family and I have used this product for two years, and it has greatly helped us stay protected from colds, flu, and even Covid-19! There are no side effects, and it genuinely boosts our immune health!
10
Immune support
A very good complex of Mg, Zn, and D3! I’ve repurchased it for my mum, and she really liked it, finding it effective for strengthening her immune system. During the Covid quarantine, my mum continued to work and thankfully avoided catching the virus, flu, or cold. I highly recommend this product.
7.5
Affordable prevention
This complex is essential in times when flu viruses are rampant. It can be taken for prevention and during influenza treatment. I really appreciate the vitamins from this brand, and the price is affordable.
9
Migraines ceased
1 people found this helpful
¡Excelente! For years I suffered from migraines, believed to be due to low zinc during ovulation and menstruation. I took calcium, magnesium, and zinc at 100%. My migraines stopped. If I felt a migraine brewing, I took two. My doctor thought I was crazy, but he later acknowledged it could be hormonal. For 10 years, I took this until menopause. Now, I use it to keep my bones healthy and strengthen my body against colds and flu. After mistakenly buying a lower strength, my migraines returned, confirming its effectiveness.
9
Migraine relief
Just MAGIC! For years, I suffered from severe migraines until my doctor prescribed Ca Mg Zn. I started taking it daily, and my migraines vanished. If I sensed a migraine coming, I would take two and avoid the discomfort. After 10 years, my migraines finally went away. Now, I use it to maintain healthy bones and strengthen my body against colds and flu, ensuring my blood levels stay normal. I know it helped with my migraines because I once bought a lower strength and they returned. When I got the right strength, they disappeared again. Highly recommended!
10
Never sick again
I never get sick anymore after consuming this vitamin—no flu or cough. Thanks!
7.5
No colds experienced
I have been using this product for years to boost my immunity. It seems effective as I haven’t caught any colds or flu.
7.5
Cold avoidance
I like this product; I mix it with vitamin C whenever I feel unwell. I’ve found it effective in helping me avoid colds and flu.
7.5
Flu prevention
The package arrived intact, and I really like the composition and taste. It effectively eliminates deficiencies quickly. I take it periodically in the autumn when flu season starts, alongside vitamin C. I’m satisfied with the results.
7.5
Quality supplements
During flu season, I try to give my family zinc-containing supplements. This combination of calcium, magnesium, zinc, and D3 is excellent for our health. I recommend taking such supplements at least twice a year. Nature's Bounty capsules are of good quality and easily swallowed.
8
Vitamin D reduces flu risk
Association Between Vitamin D and Influenza: Meta-Analysis and Systematic Review of Randomized Controlled Trials.
We explored the potential benefits of vitamin D supplementation for reducing the risk of influenza infections. Through a comprehensive analysis of multiple Randomized Controlled Trials (RCTs), we aimed to clarify whether taking vitamin D can help prevent the flu.
Our investigation identified 10 relevant trials that included a total of 4,859 participants. These studies varied in their dosages and duration of vitamin D use, allowing us to assess overall effectiveness across different populations.
The findings were encouraging: our analysis demonstrated that vitamin D supplementation appears to significantly reduce the risk of getting influenza, suggesting that those who increase their vitamin D intake might be better protected during flu season.
Importantly, we did not find significant differences between the studies that could affect our result, and there was no hint of publication bias. Consequently, we can confidently suggest that including vitamin D in our health strategies could enhance our defenses against the flu.
5
Vitamin D's limited flu benefits
A randomized trial of vitamin D supplementation to prevent seasonal influenza and enterovirus infection in children.
We conducted a randomized, double-blind, controlled trial to explore whether vitamin D supplementation could lower the risk of flu among young children. The study involved 248 participants aged two to five years from daycare centers in Taiwan, who were divided into two groups: one received 2000 IU of vitamin D daily, while the other group received a placebo for one month.
The results were intriguing. We found an 84% relative risk reduction for flu infection in the vitamin D group compared to the placebo group. However, this finding did not achieve statistical significance, which means we can't be certain of its importance. The data suggested that the placebo group might have a higher chance of getting the flu, but again, the results were not definitive.
Additionally, no significant differences were observed in terms of enterovirus infections between the two groups, and the same trend was seen among household members of the children. Everyone who received the vitamin D treatment managed to raise their vitamin D levels above 30 ng/ml, indicating that the supplementation was effective in boosting their vitamin D status.
Overall, while vitamin D supplementation might offer some protective effect against flu in preschoolers, the evidence does not strongly support this. We recommend further research to fully understand the impact.
9
Vitamin D enhances influenza defenses
Vitamin D promotes epithelial tissue repair and host defense responses against influenza H1N1 virus and Staphylococcus aureus infections.
We recently examined how vitamin D impacts our body's response to influenza H1N1, an important viral infection. Utilizing 142 clinical cases from the Department of Otolaryngology at Sun Yat-sen University, we dug into the effects of vitamin D deficiency on chronic rhinosinusitis (CRS), a condition that frequently involves damage to the airway's lining. By studying airway organoids treated with vitamin D, we were able to simulate how this treatment might bolster our defenses against flu viruses and bacteria like Staphylococcus aureus.
Our observations showed that many patients with CRS suffered from vitamin D deficiency. Notably, those who received vitamin D treatment exhibited faster cell growth in the nasal epithelium. When exposed to the H1N1 virus, these treated organoids demonstrated a remarkable ability to fend off the infection better than those without vitamin D. This protection stemmed from enhancements in host defenses, including improved production of antimicrobial proteins, reduced inflammation, and better epithelial integrity—crucial factors in fighting off infections.
We also uncovered some fascinating insights about the biological mechanisms at work. Vitamin D seemed to actively influence how epithelial cells develop and repair themselves while managing immune responses against infections. These findings underscore the significance of addressing vitamin D deficiency, especially for those vulnerable to respiratory illnesses.
8
Vitamin D3 reduces flu-like illnesses
Vitamin D3 Supplementation at 5000 IU Daily for the Prevention of Influenza-like Illness in Healthcare Workers: A Pragmatic Randomized Clinical Trial.
We conducted a practical study to investigate how daily vitamin D3 supplementation at 5000 IU might help reduce flu-like illnesses in healthcare workers. This was especially important during the COVID-19 pandemic, where preventing viral infections is crucial for those on the front lines.
Our study involved 255 healthcare workers who received the vitamin D3 supplement for at least two months and compared them to a control group of 2827 workers who did not receive the supplement. We asked participants to monitor themselves for any flu-like symptoms and report for COVID-19 testing accordingly.
The results were promising; those supplementing with vitamin D experienced a significant reduction in the incidence of flu-like illnesses. The numbers showed a noteworthy drop in non-COVID-19 flu-like illness rates among those taking the supplement. However, when it came to COVID-19 related flu-like illnesses, the difference was not statistically significant.
Overall, our exploration of vitamin D3's effects suggests that it may be a beneficial addition to the health routines of healthcare workers to stave off flu-like illnesses, although its influence on COVID-19 specifically requires further investigation.
References
Willcox ML, Lavu D, Yousaf U, Dalton S, Roberts N, et al. The effectiveness of interventions to reduce the transmission of acute respiratory infections in care homes: a systematic review. J Public Health (Oxf). 2024;46:551. 10.1093/pubmed/fdae178
Liao S, Huang Y, Zhang J, Xiong Q, Chi M, et al. Vitamin D promotes epithelial tissue repair and host defense responses against influenza H1N1 virus and Staphylococcus aureus infections. Respir Res. 2023;24:175. 10.1186/s12931-023-02477-4
van Helmond N, Brobyn TL, LaRiccia PJ, Cafaro T, Hunter K, et al. Vitamin D3 Supplementation at 5000 IU Daily for the Prevention of Influenza-like Illness in Healthcare Workers: A Pragmatic Randomized Clinical Trial. Nutrients. 2022;15. 10.3390/nu15010180
Arora J, Patel DR, Nicol MJ, Field CJ, Restori KH, et al. Vitamin D and the Ability to Produce 1,25(OH)D Are Critical for Protection from Viral Infection of the Lungs. Nutrients. 2022;14. 10.3390/nu14153061
Huang YN, Chi H, Chiu NC, Huang CY, Li ST, et al. A randomized trial of vitamin D supplementation to prevent seasonal influenza and enterovirus infection in children. J Microbiol Immunol Infect. 2022;55:803. 10.1016/j.jmii.2022.01.003
Zhu Z, Zhu X, Gu L, Zhan Y, Chen L, et al. Association Between Vitamin D and Influenza: Meta-Analysis and Systematic Review of Randomized Controlled Trials. Front Nutr. 2021;8:799709. 10.3389/fnut.2021.799709
Godan Hauptman A, Lukić-Grlić A, Vraneš J, Milošević M, Gagro A. The effect of standard-dose wintertime vitamin D supplementation on influenza infection in immunized nursing home elderly residents. Croat Med J. 2021;62:495.
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. 10.1136/bmjgh-2020-003176
Slusky DJG, Zeckhauser RJ. Sunlight and Protection Against Influenza. Econ Hum Biol. 2021;40:100942. 10.1016/j.ehb.2020.100942
Kanellopoulou C, George AB, Masutani E, Cannons JL, Ravell JC, et al. Mg regulation of kinase signaling and immune function. J Exp Med. 2019;216:1828. 10.1084/jem.20181970
Muniz FWMG, Casarin M, Pola NM, Rösing CK, Silveira TMD, et al. Efficacy of regular gargling with a cetylpyridinium chloride plus zinc containing mouthwash can reduce upper respiratory symptoms. PLoS One. 2025;20:e0316807. 10.1371/journal.pone.0316807
Nishi K, Yoshimoto S, Nishi S, Nishi T, Nishi R, et al. Epipharyngeal Abrasive Therapy Down-regulates the Expression of Cav1.2: A Key Molecule in Influenza Virus Entry. In Vivo. 2022;36:2357. 10.21873/invivo.12967
Kreiser T, Zaguri D, Sachdeva S, Zamostiano R, Mograbi J, et al. Inhibition of Respiratory RNA Viruses by a Composition of Ionophoric Polyphenols with Metal Ions. Pharmaceuticals (Basel). 2022;15. 10.3390/ph15030377
Nakashima A, Horio Y, Suzuki K, Isegawa Y. Antiviral Activity and Underlying Action Mechanism of Euglena Extract against Influenza Virus. Nutrients. 2021;13. 10.3390/nu13113911
Sadeghsoltani F, Mohammadzadeh I, Safari MM, Hassanpour P, Izadpanah M, et al. Zinc and Respiratory Viral Infections: Important Trace Element in Anti-viral Response and Immune Regulation. Biol Trace Elem Res. 2022;200:2556. 10.1007/s12011-021-02859-z