5/21/2025
Last update
5/21/2025
Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.9
USERS' SCORE
Good
Based on 20 Reviews
8.1
Supplement Facts
Serving Size: 1 Softgel
Amount Per Serving
%DV
Vitamin D3 (as Cholecalciferol)
125 mcg
625%
Top Medical Research Studies
8
We explored the connection between vitamin D levels and the frequency of upper respiratory tract infections (URTI) in physically active individuals throughout different seasons. In our research, we observed over 1,600 military recruits during their basic training, noting that only 21% were vitamin D sufficient during winter. Alarmingly, those who had sufficient vitamin D levels were found to be 40% less likely to experience URTIs compared to their deficient counterparts, suggesting that maintaining adequate vitamin D may be crucial for better respiratory health during demanding training periods.
Building on these findings, we conducted a follow-up study with 250 recruits, where we implemented various vitamin D supplementation strategies. Participants received either a placebo, simulated sunlight exposure, or oral vitamin D3 supplementation. The results were promising: vitamin D helped alleviate the severity of URTI symptoms and significantly reduced the number of days experiencing a cold. Notably, both sunlight and dietary supplementation were equally effective in boosting vitamin D levels and improving outcomes.
Overall, achieving vitamin D sufficiency can markedly reduce the burden of URTIs, particularly in physically demanding scenarios such as military training.
Building on these findings, we conducted a follow-up study with 250 recruits, where we implemented various vitamin D supplementation strategies. Participants received either a placebo, simulated sunlight exposure, or oral vitamin D3 supplementation. The results were promising: vitamin D helped alleviate the severity of URTI symptoms and significantly reduced the number of days experiencing a cold. Notably, both sunlight and dietary supplementation were equally effective in boosting vitamin D levels and improving outcomes.
Overall, achieving vitamin D sufficiency can markedly reduce the burden of URTIs, particularly in physically demanding scenarios such as military training.
Read More
8
We explored whether taking 25-hydroxyvitamin D3, a form of vitamin D, could have a positive impact on upper respiratory tract infections (URTIs), commonly known as colds. To do this, we conducted a randomized, double-blind, placebo-controlled study at clinics in Japan, involving 428 participants aged between 45 and 74 years.
Participants were divided into two groups: one received a daily dose of 10 micrograms of vitamin D3, while the other group received a placebo for 16 weeks. We monitored the frequency of URTIs, their severity, the participants’ quality of life, and the duration of the infections.
Our findings revealed that those who took vitamin D3 experienced shorter durations of URTIs, less severe symptoms, and better quality of life during their illness compared to those on the placebo. This suggests that vitamin D3 may help mitigate the discomfort associated with colds and potentially make us feel better more quickly when we are sick.
Participants were divided into two groups: one received a daily dose of 10 micrograms of vitamin D3, while the other group received a placebo for 16 weeks. We monitored the frequency of URTIs, their severity, the participants’ quality of life, and the duration of the infections.
Our findings revealed that those who took vitamin D3 experienced shorter durations of URTIs, less severe symptoms, and better quality of life during their illness compared to those on the placebo. This suggests that vitamin D3 may help mitigate the discomfort associated with colds and potentially make us feel better more quickly when we are sick.
Read More
We examined the role of vitamin D in managing common colds, delving into how it interacts with our immune system to potentially lessen the severity and duration of symptoms. The study highlighted that individuals with vitamin D deficiency, as well as those not receiving large doses, are more likely to benefit from vitamin D supplementation during cold episodes.
Findings suggest that vitamin D might act as a protective agent against common colds overall. Taking vitamin D regularly could help fortify our immune response, which plays a crucial part in fighting off the viruses responsible for colds. The research points towards the idea that maintaining adequate vitamin D levels may offer significant advantages for keeping our immune system vigilant.
However, it’s essential to approach this information with a measure of caution, as further research is necessary to draw definitive conclusions. Overall, encouraging patients to consider vitamin D as a part of their cold prevention strategy seems promising.
Findings suggest that vitamin D might act as a protective agent against common colds overall. Taking vitamin D regularly could help fortify our immune response, which plays a crucial part in fighting off the viruses responsible for colds. The research points towards the idea that maintaining adequate vitamin D levels may offer significant advantages for keeping our immune system vigilant.
However, it’s essential to approach this information with a measure of caution, as further research is necessary to draw definitive conclusions. Overall, encouraging patients to consider vitamin D as a part of their cold prevention strategy seems promising.
Read More
Most Useful Reviews
9
Effective for immunity
24 people found this helpful
Finally, my immunity began to function properly! I recommend taking vitamin D with meals that contain fats. I've been able to treat my common cold more effectively since normalising my vitamin D levels; I caught a cold only once this past year and recovered in two days, compared to being ill five to six times a year previously. I will definitely purchase more.
Read More
9
Essential for health
2 people found this helpful
Vitamin D is crucial for health. It supports the immune system and is particularly beneficial during cold weather. My family has been taking it from autumn to spring for several years, and it has effectively helped us combat the common cold and boosted our energy.
Read More
9
Essential vitamin
1 people found this helpful
Vitamin D is vital for good immunity and assists in combating various illnesses. I recommend it to everyone, especially to support against the common cold.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.9
- All Researches
8
We explored the connection between vitamin D levels and the frequency of upper respiratory tract infections (URTI) in physically active individuals throughout different seasons. In our research, we observed over 1,600 military recruits during their basic training, noting that only 21% were vitamin D sufficient during winter. Alarmingly, those who had sufficient vitamin D levels were found to be 40% less likely to experience URTIs compared to their deficient counterparts, suggesting that maintaining adequate vitamin D may be crucial for better respiratory health during demanding training periods.
Building on these findings, we conducted a follow-up study with 250 recruits, where we implemented various vitamin D supplementation strategies. Participants received either a placebo, simulated sunlight exposure, or oral vitamin D3 supplementation. The results were promising: vitamin D helped alleviate the severity of URTI symptoms and significantly reduced the number of days experiencing a cold. Notably, both sunlight and dietary supplementation were equally effective in boosting vitamin D levels and improving outcomes.
Overall, achieving vitamin D sufficiency can markedly reduce the burden of URTIs, particularly in physically demanding scenarios such as military training.
Building on these findings, we conducted a follow-up study with 250 recruits, where we implemented various vitamin D supplementation strategies. Participants received either a placebo, simulated sunlight exposure, or oral vitamin D3 supplementation. The results were promising: vitamin D helped alleviate the severity of URTI symptoms and significantly reduced the number of days experiencing a cold. Notably, both sunlight and dietary supplementation were equally effective in boosting vitamin D levels and improving outcomes.
Overall, achieving vitamin D sufficiency can markedly reduce the burden of URTIs, particularly in physically demanding scenarios such as military training.
Read More
We examined the role of vitamin D in managing common colds, delving into how it interacts with our immune system to potentially lessen the severity and duration of symptoms. The study highlighted that individuals with vitamin D deficiency, as well as those not receiving large doses, are more likely to benefit from vitamin D supplementation during cold episodes.
Findings suggest that vitamin D might act as a protective agent against common colds overall. Taking vitamin D regularly could help fortify our immune response, which plays a crucial part in fighting off the viruses responsible for colds. The research points towards the idea that maintaining adequate vitamin D levels may offer significant advantages for keeping our immune system vigilant.
However, it’s essential to approach this information with a measure of caution, as further research is necessary to draw definitive conclusions. Overall, encouraging patients to consider vitamin D as a part of their cold prevention strategy seems promising.
Findings suggest that vitamin D might act as a protective agent against common colds overall. Taking vitamin D regularly could help fortify our immune response, which plays a crucial part in fighting off the viruses responsible for colds. The research points towards the idea that maintaining adequate vitamin D levels may offer significant advantages for keeping our immune system vigilant.
However, it’s essential to approach this information with a measure of caution, as further research is necessary to draw definitive conclusions. Overall, encouraging patients to consider vitamin D as a part of their cold prevention strategy seems promising.
Read More
8
We explored whether taking 25-hydroxyvitamin D3, a form of vitamin D, could have a positive impact on upper respiratory tract infections (URTIs), commonly known as colds. To do this, we conducted a randomized, double-blind, placebo-controlled study at clinics in Japan, involving 428 participants aged between 45 and 74 years.
Participants were divided into two groups: one received a daily dose of 10 micrograms of vitamin D3, while the other group received a placebo for 16 weeks. We monitored the frequency of URTIs, their severity, the participants’ quality of life, and the duration of the infections.
Our findings revealed that those who took vitamin D3 experienced shorter durations of URTIs, less severe symptoms, and better quality of life during their illness compared to those on the placebo. This suggests that vitamin D3 may help mitigate the discomfort associated with colds and potentially make us feel better more quickly when we are sick.
Participants were divided into two groups: one received a daily dose of 10 micrograms of vitamin D3, while the other group received a placebo for 16 weeks. We monitored the frequency of URTIs, their severity, the participants’ quality of life, and the duration of the infections.
Our findings revealed that those who took vitamin D3 experienced shorter durations of URTIs, less severe symptoms, and better quality of life during their illness compared to those on the placebo. This suggests that vitamin D3 may help mitigate the discomfort associated with colds and potentially make us feel better more quickly when we are sick.
Read More
8
Vitamin D aids immune response
We observed the important role that vitamin D plays in maintaining a healthy immune system, particularly regarding the common cold. Research indicates that vitamin D may help limit the incidence and duration of infections, which can be especially beneficial for athletes.
Notably, many individuals, including athletes, often exhibit low vitamin D levels, especially during winter months. This deficiency may increase the risk of catching common illnesses like colds and flu.
While studies suggest that vitamin D can have a positive effect on immune function, the evidence around its effectiveness specifically for the common cold isn't overwhelming. We found that a well-balanced approach to nutrition, rather than relying solely on supplements, is essential for optimal immune health in athletes.
Notably, many individuals, including athletes, often exhibit low vitamin D levels, especially during winter months. This deficiency may increase the risk of catching common illnesses like colds and flu.
While studies suggest that vitamin D can have a positive effect on immune function, the evidence around its effectiveness specifically for the common cold isn't overwhelming. We found that a well-balanced approach to nutrition, rather than relying solely on supplements, is essential for optimal immune health in athletes.
Read More
8
We explored how a combination of vitamins and minerals, including vitamin D, could potentially influence the frequency and severity of common colds among individuals who frequently suffer from upper respiratory infections. In a well-structured study involving 192 participants, we conducted a randomized, placebo-controlled, double-blind trial that lasted for 16 weeks.
Throughout the trial, we monitored a range of factors, including the number and intensity of cold symptoms. Notably, those who received the micronutrient combination, which encompassed vitamins like C and D as well as other essential nutrients, reported significant improvements compared to participants who received a placebo.
Our findings revealed that patients who were initially experiencing a severe common cold saw a notable decrease in their symptoms. Additionally, individuals under 45 years who took the micronutrient blend were less likely to miss work during cold episodes. Importantly, those with initially low levels of vitamin D and C reported fewer colds while taking the supplements.
While vitamin D played a role alongside other micronutrients in improving cold symptoms and reducing infection frequencies, we must recognize that it was part of a broader combination. Thus, while we observed promising results, the specific contribution of vitamin D alone remains challenging to delineate.
Throughout the trial, we monitored a range of factors, including the number and intensity of cold symptoms. Notably, those who received the micronutrient combination, which encompassed vitamins like C and D as well as other essential nutrients, reported significant improvements compared to participants who received a placebo.
Our findings revealed that patients who were initially experiencing a severe common cold saw a notable decrease in their symptoms. Additionally, individuals under 45 years who took the micronutrient blend were less likely to miss work during cold episodes. Importantly, those with initially low levels of vitamin D and C reported fewer colds while taking the supplements.
While vitamin D played a role alongside other micronutrients in improving cold symptoms and reducing infection frequencies, we must recognize that it was part of a broader combination. Thus, while we observed promising results, the specific contribution of vitamin D alone remains challenging to delineate.
Read More
User Reviews
USERS' SCORE
Good
Based on 20 Reviews
8.1
- All Reviews
- Positive Reviews
- Negative Reviews
9
Effective for immunity
24 people found this helpful
Finally, my immunity began to function properly! I recommend taking vitamin D with meals that contain fats. I've been able to treat my common cold more effectively since normalising my vitamin D levels; I caught a cold only once this past year and recovered in two days, compared to being ill five to six times a year previously. I will definitely purchase more.
Read More
9
Essential for health
2 people found this helpful
Vitamin D is crucial for health. It supports the immune system and is particularly beneficial during cold weather. My family has been taking it from autumn to spring for several years, and it has effectively helped us combat the common cold and boosted our energy.
Read More
9
Essential vitamin
1 people found this helpful
Vitamin D is vital for good immunity and assists in combating various illnesses. I recommend it to everyone, especially to support against the common cold.
Read More
8
Supports immune health
1 people found this helpful
Vitamin D is crucial for strong immunity and overall well-being. It helps to maintain the body's protective functions and skeletal health, especially during the cold months. In northern areas, additional intake may be needed, even in summer, to keep vitamin levels at an optimal state. The quality is excellent, and the brand is reputable. It provides solid support to prevent sickness.
Read More
7.5
Vital for energy
1 people found this helpful
An indispensable assistant during autumn and spring to maintain immunity during the cold season, vitamin D also helps me feel more energetic. I strongly recommend it.
Read More
Frequently Asked Questions
9
Effective for immunity
24 people found this helpful
Finally, my immunity began to function properly! I recommend taking vitamin D with meals that contain fats. I've been able to treat my common cold more effectively since normalising my vitamin D levels; I caught a cold only once this past year and recovered in two days, compared to being ill five to six times a year previously. I will definitely purchase more.
6
Prevention benefits
1 people found this helpful
I have been taking vitamin D for about six months as a preventive measure and have noticed that I catch common colds less often. I’m pleased with the results.
6
Cold relief dosage
2 people found this helpful
I regularly purchase Vitamin D in small capsules, using a high dosage of 5000 IU during winter and for 2-3 weeks with breaks. It’s particularly effective during the initial days of a common cold; I take one capsule for several days.
8
Improved wellbeing
Vitamin D is essential for those in cold climates. I noticed my chronic fatigue and drowsiness disappeared. This American product is cost-effective, and my vitamin D levels have improved significantly.
7.5
Strengthens immunity
It has been beneficial in strengthening my immune system. I've noticed a significant improvement when I had a nasty cold and recovered quickly, which typically takes me much longer.
7.5
Reduced fatigue
1 people found this helpful
I appreciate this vitamin D, essential for those in Russia. Following my doctor's advice, I've taken 10,000 IU. My fatigue has disappeared, and I catch common colds less frequently. I recommend it.
7
Vitamin D alleviates cold symptoms
We explored the potential benefits of 25-hydroxyvitamin D (25OHD) in alleviating symptoms of the common cold, specifically during upper respiratory tract infections (URTIs). In our analysis, we utilized data from a randomized, double-blind, placebo-controlled study where participants received either 10 μg of 25OHD or a placebo for 16 weeks.
Our findings revealed that participants in the vitamin D group reported significantly fewer physical symptoms such as runny nose, sneezing, and head congestion compared to those who received the placebo. Additionally, we observed improvements in quality of life scores, particularly regarding various symptoms.
However, it’s essential to note that there were no significant differences in the overall number of URTI episodes or the use of medications like antibiotics and analgesics between the two groups.
Overall, this study suggests that adequate intake of vitamin D can help ease physical discomfort associated with the onset of common colds, especially nasal symptoms, potentially enhancing our quality of life during such infections.
Our findings revealed that participants in the vitamin D group reported significantly fewer physical symptoms such as runny nose, sneezing, and head congestion compared to those who received the placebo. Additionally, we observed improvements in quality of life scores, particularly regarding various symptoms.
However, it’s essential to note that there were no significant differences in the overall number of URTI episodes or the use of medications like antibiotics and analgesics between the two groups.
Overall, this study suggests that adequate intake of vitamin D can help ease physical discomfort associated with the onset of common colds, especially nasal symptoms, potentially enhancing our quality of life during such infections.
8
We explored whether taking 25-hydroxyvitamin D3, a form of vitamin D, could have a positive impact on upper respiratory tract infections (URTIs), commonly known as colds. To do this, we conducted a randomized, double-blind, placebo-controlled study at clinics in Japan, involving 428 participants aged between 45 and 74 years.
Participants were divided into two groups: one received a daily dose of 10 micrograms of vitamin D3, while the other group received a placebo for 16 weeks. We monitored the frequency of URTIs, their severity, the participants’ quality of life, and the duration of the infections.
Our findings revealed that those who took vitamin D3 experienced shorter durations of URTIs, less severe symptoms, and better quality of life during their illness compared to those on the placebo. This suggests that vitamin D3 may help mitigate the discomfort associated with colds and potentially make us feel better more quickly when we are sick.
Participants were divided into two groups: one received a daily dose of 10 micrograms of vitamin D3, while the other group received a placebo for 16 weeks. We monitored the frequency of URTIs, their severity, the participants’ quality of life, and the duration of the infections.
Our findings revealed that those who took vitamin D3 experienced shorter durations of URTIs, less severe symptoms, and better quality of life during their illness compared to those on the placebo. This suggests that vitamin D3 may help mitigate the discomfort associated with colds and potentially make us feel better more quickly when we are sick.
8
We conducted a double-blind, placebo-controlled study involving 192 patients who frequently suffered from upper respiratory tract infections, commonly known as colds. Our goal was to evaluate the effectiveness of a combination of micronutrients, including vitamin D, in reducing the severity and frequency of these infections.
Among our findings, we observed that patients with initial cold symptoms experienced greater improvements when taking the micronutrient combination compared to those on placebo. Notably, those with vitamin D deficiency or low vitamin C levels in the active group reported significantly fewer cold episodes than those in the placebo group.
Moreover, serum levels of vitamin C, folic acid, and selenium increased in those taking the micronutrient blend throughout the study, indicating a beneficial effect on nutritional status. While the results suggest that this combination may enhance overall immune function and potentially reduce the impact of colds, it’s important to note that we cannot isolate the specific effects of vitamin D from the other nutrients in the study.
Overall, our results highlight the potential advantages of maintaining optimal vitamin and mineral levels to support immune health, particularly for those prone to recurrent colds. Nevertheless, further research is necessary to understand the individual role of vitamin D in this context.
Among our findings, we observed that patients with initial cold symptoms experienced greater improvements when taking the micronutrient combination compared to those on placebo. Notably, those with vitamin D deficiency or low vitamin C levels in the active group reported significantly fewer cold episodes than those in the placebo group.
Moreover, serum levels of vitamin C, folic acid, and selenium increased in those taking the micronutrient blend throughout the study, indicating a beneficial effect on nutritional status. While the results suggest that this combination may enhance overall immune function and potentially reduce the impact of colds, it’s important to note that we cannot isolate the specific effects of vitamin D from the other nutrients in the study.
Overall, our results highlight the potential advantages of maintaining optimal vitamin and mineral levels to support immune health, particularly for those prone to recurrent colds. Nevertheless, further research is necessary to understand the individual role of vitamin D in this context.
We examined the role of vitamin D in managing common colds, delving into how it interacts with our immune system to potentially lessen the severity and duration of symptoms. The study highlighted that individuals with vitamin D deficiency, as well as those not receiving large doses, are more likely to benefit from vitamin D supplementation during cold episodes.
Findings suggest that vitamin D might act as a protective agent against common colds overall. Taking vitamin D regularly could help fortify our immune response, which plays a crucial part in fighting off the viruses responsible for colds. The research points towards the idea that maintaining adequate vitamin D levels may offer significant advantages for keeping our immune system vigilant.
However, it’s essential to approach this information with a measure of caution, as further research is necessary to draw definitive conclusions. Overall, encouraging patients to consider vitamin D as a part of their cold prevention strategy seems promising.
Findings suggest that vitamin D might act as a protective agent against common colds overall. Taking vitamin D regularly could help fortify our immune response, which plays a crucial part in fighting off the viruses responsible for colds. The research points towards the idea that maintaining adequate vitamin D levels may offer significant advantages for keeping our immune system vigilant.
However, it’s essential to approach this information with a measure of caution, as further research is necessary to draw definitive conclusions. Overall, encouraging patients to consider vitamin D as a part of their cold prevention strategy seems promising.
8
Vitamin D aids immune response
We observed the important role that vitamin D plays in maintaining a healthy immune system, particularly regarding the common cold. Research indicates that vitamin D may help limit the incidence and duration of infections, which can be especially beneficial for athletes.
Notably, many individuals, including athletes, often exhibit low vitamin D levels, especially during winter months. This deficiency may increase the risk of catching common illnesses like colds and flu.
While studies suggest that vitamin D can have a positive effect on immune function, the evidence around its effectiveness specifically for the common cold isn't overwhelming. We found that a well-balanced approach to nutrition, rather than relying solely on supplements, is essential for optimal immune health in athletes.
Notably, many individuals, including athletes, often exhibit low vitamin D levels, especially during winter months. This deficiency may increase the risk of catching common illnesses like colds and flu.
While studies suggest that vitamin D can have a positive effect on immune function, the evidence around its effectiveness specifically for the common cold isn't overwhelming. We found that a well-balanced approach to nutrition, rather than relying solely on supplements, is essential for optimal immune health in athletes.
References
- Harrison SE, Oliver SJ, Kashi DS, Carswell AT, Edwards JP, et al. Influence of Vitamin D Supplementation by Simulated Sunlight or Oral D3 on Respiratory Infection during Military Training. Med Sci Sports Exerc. 2021;53:1505. 10.1249/MSS.0000000000002604
- Shimizu Y, Ito Y, Uotsu N, Yui K. Intake of 25-Hydroxyvitamin D May Reduce the Severity of Upper Respiratory Tract Infection: Post hoc Analysis of a Randomized, Double-Blind, Placebo-Controlled, Parallel Group Comparison Study. Nutrients. 2020;12. 10.3390/nu12123769
- Rondanelli M, Miccono A, Lamburghini S, Avanzato I, Riva A, et al. Self-Care for Common Colds: The Pivotal Role of Vitamin D, Vitamin C, Zinc, and in Three Main Immune Interactive Clusters (Physical Barriers, Innate and Adaptive Immunity) Involved during an Episode of Common Colds-Practical Advice on Dosages and on the Time to Take These Nutrients/Botanicals in order to Prevent or Treat Common Colds. Evid Based Complement Alternat Med. 2018;2018:5813095. 10.1155/2018/5813095
- Shimizu Y, Ito Y, Yui K, Egawa K, Orimo H. Intake of 25-Hydroxyvitamin D3 Reduces Duration and Severity of Upper Respiratory Tract Infection: A Randomized, Double-Blind, Placebo-Controlled, Parallel Group Comparison Study. J Nutr Health Aging. 2018;22:491. 10.1007/s12603-017-0952-x
- Gleeson M. Immunological aspects of sport nutrition. Immunol Cell Biol. 2016;94:117. 10.1038/icb.2015.109
- Schmidt K, Zirkler S. [Dietary efficacy of a micronutrient combination in patients with recurrent upper respiratory tract infections. Results of a placebo-controlled double-blind study]. MMW Fortschr Med. 2011;153 Suppl 3:83.
- Schmidt K, Zirkler S. [Dietary efficacy of a micronutrient combination in patients with recurrent upper respiratory tract infections. Results of a placebo-controlled doubleblind study.]. MMW Fortschr Med. 2011;153:83. 10.1007/s15006-011-1630-2
