5/4/2025
Last update
5/4/2025
Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8
USERS' SCORE
Good
Based on 10 Reviews
8.7
Supplement Facts
Serving Size: 2 Tablets
Amount Per Serving
%DV
Vitamin D3 (as Cholecalciferol)
13 mcg (500 IU)
63%
Calcium (as Calcium Citrate)
630 mg
48%
Top Medical Research Studies
8
We explored how 25-hydroxyvitamin D3 (25OHD), a form of vitamin D, influences upper respiratory tract infections (URTIs), commonly known as colds. In a carefully designed clinical study, we followed 428 participants aged 45 to 74 over a 16-week period. They were randomly assigned to receive either 10 μg of 25OHD daily or a placebo, all while maintaining a double-blind setup to ensure accurate results.
Our findings revealed that those who took 25OHD had reduced duration and severity of their cold symptoms. Participants reported improvements in their overall quality of life during the bouts of URTI. By tracking the health of the participants through surveys designed to measure cold symptoms, we gathered valuable data that indicates vitamin D3 could play a helpful role in managing colds.
This suggests that incorporating vitamin D3 into our diets may be beneficial when we catch a cold, potentially leading to a quicker recovery. It’s a promising avenue for anyone looking to ease the discomfort and duration of these frustrating infections.
Our findings revealed that those who took 25OHD had reduced duration and severity of their cold symptoms. Participants reported improvements in their overall quality of life during the bouts of URTI. By tracking the health of the participants through surveys designed to measure cold symptoms, we gathered valuable data that indicates vitamin D3 could play a helpful role in managing colds.
This suggests that incorporating vitamin D3 into our diets may be beneficial when we catch a cold, potentially leading to a quicker recovery. It’s a promising avenue for anyone looking to ease the discomfort and duration of these frustrating infections.
Read More
8
We delved into the effects of vitamin D on cold symptoms among military recruits during their training. In two comprehensive studies, we observed over 1,600 military recruits to see how their vitamin D levels impacted their likelihood of upper respiratory tract infections (URTIs) throughout the seasons.
In the first study, only 21% of recruits were found to have sufficient vitamin D levels during winter. Notably, those with adequate vitamin D were 40% less likely to experience URTIs compared to those who were deficient. Each URTI typically caused three missed training days, indicating a significant impact on their training schedules.
Following this, we conducted a randomized controlled trial with 250 men simulating sunlight exposure or providing oral vitamin D3 supplementation. Our goal was to see how both methods affected overall vitamin D levels and, subsequently, URTI symptoms. Remarkably, both strategies successfully brought participants to sufficient vitamin D levels. Compared to those who received a placebo, those getting vitamin D3 experienced a 15% reduction in the severity of cold symptoms and a 36% decrease in the number of days with URTI.
Interestingly, we found that both methods—simulated sunlight and oral supplementation—were equally effective, and neither had a significant impact on specific immune response markers.
In the first study, only 21% of recruits were found to have sufficient vitamin D levels during winter. Notably, those with adequate vitamin D were 40% less likely to experience URTIs compared to those who were deficient. Each URTI typically caused three missed training days, indicating a significant impact on their training schedules.
Following this, we conducted a randomized controlled trial with 250 men simulating sunlight exposure or providing oral vitamin D3 supplementation. Our goal was to see how both methods affected overall vitamin D levels and, subsequently, URTI symptoms. Remarkably, both strategies successfully brought participants to sufficient vitamin D levels. Compared to those who received a placebo, those getting vitamin D3 experienced a 15% reduction in the severity of cold symptoms and a 36% decrease in the number of days with URTI.
Interestingly, we found that both methods—simulated sunlight and oral supplementation—were equally effective, and neither had a significant impact on specific immune response markers.
Read More
8
Vitamin D3 aids cold symptom relief
We explored the potential benefits of vitamin D3, specifically 25-hydroxyvitamin D, on cold symptoms among people with insufficient or deficient levels of this essential nutrient. The study was well-designed, involving a randomized, double-blind, placebo-controlled method where participants received either 10 μg of vitamin D3 or a placebo over 16 weeks.
During the study, we used a tool called the Wisconsin Upper Respiratory Symptom Survey-21, which helped us collect data on physical signs and symptoms of upper respiratory tract infections (URTI). We observed that participants who took vitamin D3 experienced significantly lower scores for symptoms like runny nose, sneezing, and head congestion compared to those on a placebo. Additionally, their overall quality of life, except for the ability to breathe easily, improved when they were taking vitamin D3.
However, it's important to note that the number of cold occurrences and the use of other medications, like antibiotics and pain relievers, showed no significant difference between the two groups. Overall, our findings suggest that adequate intake of vitamin D3 can indeed help reduce certain cold symptoms and enhance quality of life when a cold strikes.
During the study, we used a tool called the Wisconsin Upper Respiratory Symptom Survey-21, which helped us collect data on physical signs and symptoms of upper respiratory tract infections (URTI). We observed that participants who took vitamin D3 experienced significantly lower scores for symptoms like runny nose, sneezing, and head congestion compared to those on a placebo. Additionally, their overall quality of life, except for the ability to breathe easily, improved when they were taking vitamin D3.
However, it's important to note that the number of cold occurrences and the use of other medications, like antibiotics and pain relievers, showed no significant difference between the two groups. Overall, our findings suggest that adequate intake of vitamin D3 can indeed help reduce certain cold symptoms and enhance quality of life when a cold strikes.
Read More
Most Useful Reviews
10
Cold prevention success
135 people found this helpful
Vitamins D3 effectively boost the immune system. Throughout my life, I have suffered from herpes and tried many things to raise my immunity, but nothing worked. I decided to try these vitamins, and now, in autumn, all my colleagues except me got a cold; even those who were sceptical now take them.
Read More
9
Effective cold remedy
90 people found this helpful
I was amazed at how fast and effective this Vitamin is! Previously, when I caught a cold, I would have my whole family supplement with the same vitamins. However, when there are no ill effects from the cold virus and headaches, we stop taking the supplements altogether.
Read More
9
Quick recovery from cold
I have only recently taken this calcium, but I've noticed a strengthening of my immune system. I caught a viral illness, the popular virus of 2020, and got over it almost unnoticed with just a slightly stuffy nose and general weakness lasting only 2 days! I used to have a cold that lasted longer. I doubled the daily dose, and I felt no residual weakness!
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8
- All Researches
8
We delved into the effects of vitamin D on cold symptoms among military recruits during their training. In two comprehensive studies, we observed over 1,600 military recruits to see how their vitamin D levels impacted their likelihood of upper respiratory tract infections (URTIs) throughout the seasons.
In the first study, only 21% of recruits were found to have sufficient vitamin D levels during winter. Notably, those with adequate vitamin D were 40% less likely to experience URTIs compared to those who were deficient. Each URTI typically caused three missed training days, indicating a significant impact on their training schedules.
Following this, we conducted a randomized controlled trial with 250 men simulating sunlight exposure or providing oral vitamin D3 supplementation. Our goal was to see how both methods affected overall vitamin D levels and, subsequently, URTI symptoms. Remarkably, both strategies successfully brought participants to sufficient vitamin D levels. Compared to those who received a placebo, those getting vitamin D3 experienced a 15% reduction in the severity of cold symptoms and a 36% decrease in the number of days with URTI.
Interestingly, we found that both methods—simulated sunlight and oral supplementation—were equally effective, and neither had a significant impact on specific immune response markers.
In the first study, only 21% of recruits were found to have sufficient vitamin D levels during winter. Notably, those with adequate vitamin D were 40% less likely to experience URTIs compared to those who were deficient. Each URTI typically caused three missed training days, indicating a significant impact on their training schedules.
Following this, we conducted a randomized controlled trial with 250 men simulating sunlight exposure or providing oral vitamin D3 supplementation. Our goal was to see how both methods affected overall vitamin D levels and, subsequently, URTI symptoms. Remarkably, both strategies successfully brought participants to sufficient vitamin D levels. Compared to those who received a placebo, those getting vitamin D3 experienced a 15% reduction in the severity of cold symptoms and a 36% decrease in the number of days with URTI.
Interestingly, we found that both methods—simulated sunlight and oral supplementation—were equally effective, and neither had a significant impact on specific immune response markers.
Read More
8
Vitamin D3 aids cold symptom relief
We explored the potential benefits of vitamin D3, specifically 25-hydroxyvitamin D, on cold symptoms among people with insufficient or deficient levels of this essential nutrient. The study was well-designed, involving a randomized, double-blind, placebo-controlled method where participants received either 10 μg of vitamin D3 or a placebo over 16 weeks.
During the study, we used a tool called the Wisconsin Upper Respiratory Symptom Survey-21, which helped us collect data on physical signs and symptoms of upper respiratory tract infections (URTI). We observed that participants who took vitamin D3 experienced significantly lower scores for symptoms like runny nose, sneezing, and head congestion compared to those on a placebo. Additionally, their overall quality of life, except for the ability to breathe easily, improved when they were taking vitamin D3.
However, it's important to note that the number of cold occurrences and the use of other medications, like antibiotics and pain relievers, showed no significant difference between the two groups. Overall, our findings suggest that adequate intake of vitamin D3 can indeed help reduce certain cold symptoms and enhance quality of life when a cold strikes.
During the study, we used a tool called the Wisconsin Upper Respiratory Symptom Survey-21, which helped us collect data on physical signs and symptoms of upper respiratory tract infections (URTI). We observed that participants who took vitamin D3 experienced significantly lower scores for symptoms like runny nose, sneezing, and head congestion compared to those on a placebo. Additionally, their overall quality of life, except for the ability to breathe easily, improved when they were taking vitamin D3.
However, it's important to note that the number of cold occurrences and the use of other medications, like antibiotics and pain relievers, showed no significant difference between the two groups. Overall, our findings suggest that adequate intake of vitamin D3 can indeed help reduce certain cold symptoms and enhance quality of life when a cold strikes.
Read More
8
We explored how 25-hydroxyvitamin D3 (25OHD), a form of vitamin D, influences upper respiratory tract infections (URTIs), commonly known as colds. In a carefully designed clinical study, we followed 428 participants aged 45 to 74 over a 16-week period. They were randomly assigned to receive either 10 μg of 25OHD daily or a placebo, all while maintaining a double-blind setup to ensure accurate results.
Our findings revealed that those who took 25OHD had reduced duration and severity of their cold symptoms. Participants reported improvements in their overall quality of life during the bouts of URTI. By tracking the health of the participants through surveys designed to measure cold symptoms, we gathered valuable data that indicates vitamin D3 could play a helpful role in managing colds.
This suggests that incorporating vitamin D3 into our diets may be beneficial when we catch a cold, potentially leading to a quicker recovery. It’s a promising avenue for anyone looking to ease the discomfort and duration of these frustrating infections.
Our findings revealed that those who took 25OHD had reduced duration and severity of their cold symptoms. Participants reported improvements in their overall quality of life during the bouts of URTI. By tracking the health of the participants through surveys designed to measure cold symptoms, we gathered valuable data that indicates vitamin D3 could play a helpful role in managing colds.
This suggests that incorporating vitamin D3 into our diets may be beneficial when we catch a cold, potentially leading to a quicker recovery. It’s a promising avenue for anyone looking to ease the discomfort and duration of these frustrating infections.
Read More
User Reviews
USERS' SCORE
Good
Based on 10 Reviews
8.7
- All Reviews
- Positive Reviews
- Negative Reviews
10
Cold prevention success
135 people found this helpful
Vitamins D3 effectively boost the immune system. Throughout my life, I have suffered from herpes and tried many things to raise my immunity, but nothing worked. I decided to try these vitamins, and now, in autumn, all my colleagues except me got a cold; even those who were sceptical now take them.
Read More
9
Effective cold remedy
90 people found this helpful
I was amazed at how fast and effective this Vitamin is! Previously, when I caught a cold, I would have my whole family supplement with the same vitamins. However, when there are no ill effects from the cold virus and headaches, we stop taking the supplements altogether.
Read More
9
Quick recovery from cold
I have only recently taken this calcium, but I've noticed a strengthening of my immune system. I caught a viral illness, the popular virus of 2020, and got over it almost unnoticed with just a slightly stuffy nose and general weakness lasting only 2 days! I used to have a cold that lasted longer. I doubled the daily dose, and I felt no residual weakness!
Read More
9
Cold and ARVI prevention
Excellent! I regularly take vitamin C in spring and autumn. I rarely get sick with colds and ARVI, and even Covid affected me only mildly this year in August. I recommend it; it also significantly improves the condition of my skin and hair.
Read More
9
Strong immunity during cold
These vitamins have greatly supported my immunity. I almost never get sick during the cold season, and they help maintain my immune system at a good level. I also feel less tired and sleep better. I'm planning to continue taking them.
Read More
Frequently Asked Questions
9
Effective cold remedy
90 people found this helpful
I was amazed at how fast and effective this Vitamin is! Previously, when I caught a cold, I would have my whole family supplement with the same vitamins. However, when there are no ill effects from the cold virus and headaches, we stop taking the supplements altogether.
9
Quick recovery from cold
I have only recently taken this calcium, but I've noticed a strengthening of my immune system. I caught a viral illness, the popular virus of 2020, and got over it almost unnoticed with just a slightly stuffy nose and general weakness lasting only 2 days! I used to have a cold that lasted longer. I doubled the daily dose, and I felt no residual weakness!
9
Strong immunity during cold
These vitamins have greatly supported my immunity. I almost never get sick during the cold season, and they help maintain my immune system at a good level. I also feel less tired and sleep better. I'm planning to continue taking them.
10
Cold prevention success
135 people found this helpful
Vitamins D3 effectively boost the immune system. Throughout my life, I have suffered from herpes and tried many things to raise my immunity, but nothing worked. I decided to try these vitamins, and now, in autumn, all my colleagues except me got a cold; even those who were sceptical now take them.
9
Cold and ARVI prevention
Excellent! I regularly take vitamin C in spring and autumn. I rarely get sick with colds and ARVI, and even Covid affected me only mildly this year in August. I recommend it; it also significantly improves the condition of my skin and hair.
7.5
Easier cold recovery
I use this for complex therapy in psoriasis treatment as a highly effective alternative to calcium injections. At the first symptoms of a cold or virus, I give my child one capsule each day; illnesses are transferred more easily and more often without fever. Highly recommend.
8
We delved into the effects of vitamin D on cold symptoms among military recruits during their training. In two comprehensive studies, we observed over 1,600 military recruits to see how their vitamin D levels impacted their likelihood of upper respiratory tract infections (URTIs) throughout the seasons.
In the first study, only 21% of recruits were found to have sufficient vitamin D levels during winter. Notably, those with adequate vitamin D were 40% less likely to experience URTIs compared to those who were deficient. Each URTI typically caused three missed training days, indicating a significant impact on their training schedules.
Following this, we conducted a randomized controlled trial with 250 men simulating sunlight exposure or providing oral vitamin D3 supplementation. Our goal was to see how both methods affected overall vitamin D levels and, subsequently, URTI symptoms. Remarkably, both strategies successfully brought participants to sufficient vitamin D levels. Compared to those who received a placebo, those getting vitamin D3 experienced a 15% reduction in the severity of cold symptoms and a 36% decrease in the number of days with URTI.
Interestingly, we found that both methods—simulated sunlight and oral supplementation—were equally effective, and neither had a significant impact on specific immune response markers.
In the first study, only 21% of recruits were found to have sufficient vitamin D levels during winter. Notably, those with adequate vitamin D were 40% less likely to experience URTIs compared to those who were deficient. Each URTI typically caused three missed training days, indicating a significant impact on their training schedules.
Following this, we conducted a randomized controlled trial with 250 men simulating sunlight exposure or providing oral vitamin D3 supplementation. Our goal was to see how both methods affected overall vitamin D levels and, subsequently, URTI symptoms. Remarkably, both strategies successfully brought participants to sufficient vitamin D levels. Compared to those who received a placebo, those getting vitamin D3 experienced a 15% reduction in the severity of cold symptoms and a 36% decrease in the number of days with URTI.
Interestingly, we found that both methods—simulated sunlight and oral supplementation—were equally effective, and neither had a significant impact on specific immune response markers.
8
Vitamin D3 aids cold symptom relief
We explored the potential benefits of vitamin D3, specifically 25-hydroxyvitamin D, on cold symptoms among people with insufficient or deficient levels of this essential nutrient. The study was well-designed, involving a randomized, double-blind, placebo-controlled method where participants received either 10 μg of vitamin D3 or a placebo over 16 weeks.
During the study, we used a tool called the Wisconsin Upper Respiratory Symptom Survey-21, which helped us collect data on physical signs and symptoms of upper respiratory tract infections (URTI). We observed that participants who took vitamin D3 experienced significantly lower scores for symptoms like runny nose, sneezing, and head congestion compared to those on a placebo. Additionally, their overall quality of life, except for the ability to breathe easily, improved when they were taking vitamin D3.
However, it's important to note that the number of cold occurrences and the use of other medications, like antibiotics and pain relievers, showed no significant difference between the two groups. Overall, our findings suggest that adequate intake of vitamin D3 can indeed help reduce certain cold symptoms and enhance quality of life when a cold strikes.
During the study, we used a tool called the Wisconsin Upper Respiratory Symptom Survey-21, which helped us collect data on physical signs and symptoms of upper respiratory tract infections (URTI). We observed that participants who took vitamin D3 experienced significantly lower scores for symptoms like runny nose, sneezing, and head congestion compared to those on a placebo. Additionally, their overall quality of life, except for the ability to breathe easily, improved when they were taking vitamin D3.
However, it's important to note that the number of cold occurrences and the use of other medications, like antibiotics and pain relievers, showed no significant difference between the two groups. Overall, our findings suggest that adequate intake of vitamin D3 can indeed help reduce certain cold symptoms and enhance quality of life when a cold strikes.
8
We explored how 25-hydroxyvitamin D3 (25OHD), a form of vitamin D, influences upper respiratory tract infections (URTIs), commonly known as colds. In a carefully designed clinical study, we followed 428 participants aged 45 to 74 over a 16-week period. They were randomly assigned to receive either 10 μg of 25OHD daily or a placebo, all while maintaining a double-blind setup to ensure accurate results.
Our findings revealed that those who took 25OHD had reduced duration and severity of their cold symptoms. Participants reported improvements in their overall quality of life during the bouts of URTI. By tracking the health of the participants through surveys designed to measure cold symptoms, we gathered valuable data that indicates vitamin D3 could play a helpful role in managing colds.
This suggests that incorporating vitamin D3 into our diets may be beneficial when we catch a cold, potentially leading to a quicker recovery. It’s a promising avenue for anyone looking to ease the discomfort and duration of these frustrating infections.
Our findings revealed that those who took 25OHD had reduced duration and severity of their cold symptoms. Participants reported improvements in their overall quality of life during the bouts of URTI. By tracking the health of the participants through surveys designed to measure cold symptoms, we gathered valuable data that indicates vitamin D3 could play a helpful role in managing colds.
This suggests that incorporating vitamin D3 into our diets may be beneficial when we catch a cold, potentially leading to a quicker recovery. It’s a promising avenue for anyone looking to ease the discomfort and duration of these frustrating infections.
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
- 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
