Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8.3
USERS' SCORE
Good
Based on 7 Reviews
8.2
Supplement Facts
Serving Size: 1 Softgel
Amount Per Serving
%DV
Calories
5
Total Fat
0.5 g
< 1%**
Vitamin A (from Retinyl Palmitate and Cod Liver Oil)
750 mcg
83%
Vitamin D3 (from Cholecalciferol and Cod Liver Oil)
6.75 mcg (270 IU)
34%
Cod Liver Oil
650 mg
†
Top Medical Research Studies
9
We explored how vitamin A affects our body’s response to cold, specifically looking at its role in transforming white fat into brown fat, a process known as browning. This transformation is significant, as it can help reduce obesity and improve metabolic health.
In our investigation, we conducted cold exposure studies involving both mice and humans. We observed that exposure to cold led to an increase in circulating vitamin A, also known as retinol, and its transporter protein, Rbp. However, in mice lacking this protein, we found that their ability to adapt to the cold and promote thermogenesis—essentially, generating heat through fat—was severely compromised.
Interestingly, we also noted that stimulating human fat cells with retinol heightened the expression of genes associated with thermogenesis and boosted mitochondrial activity, which is vital for burning fat. In humans, the rise in vitamin A during cold exposure hinted at improved fat utilization.
Overall, our findings revealed that not only are vitamin A levels responsive to cold, but effective transportation of this vitamin is crucial for cold-induced fat browning and the body's ability to generate heat.
In our investigation, we conducted cold exposure studies involving both mice and humans. We observed that exposure to cold led to an increase in circulating vitamin A, also known as retinol, and its transporter protein, Rbp. However, in mice lacking this protein, we found that their ability to adapt to the cold and promote thermogenesis—essentially, generating heat through fat—was severely compromised.
Interestingly, we also noted that stimulating human fat cells with retinol heightened the expression of genes associated with thermogenesis and boosted mitochondrial activity, which is vital for burning fat. In humans, the rise in vitamin A during cold exposure hinted at improved fat utilization.
Overall, our findings revealed that not only are vitamin A levels responsive to cold, but effective transportation of this vitamin is crucial for cold-induced fat browning and the body's ability to generate heat.
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.
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.
Most Useful Reviews
9
Stopped catching colds
I drink these vitamins regularly, and they have raised my immunity. Since I started taking them, I have not had a cold.
9
Less frequent colds
I have been taking cod liver oil for over 20 years and found that I experience fewer colds. I used to get colds 4-6 times annually, but now they have decreased to none or maybe once a year, and if I do catch a cold, it isn’t severe.
7.5
Effective immunity boost
Heading into cold and flu season, I strive to boost my family's immunity, and it’s working well for us.
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8.3
- All Researches
9
We explored how vitamin A affects our body’s response to cold, specifically looking at its role in transforming white fat into brown fat, a process known as browning. This transformation is significant, as it can help reduce obesity and improve metabolic health.
In our investigation, we conducted cold exposure studies involving both mice and humans. We observed that exposure to cold led to an increase in circulating vitamin A, also known as retinol, and its transporter protein, Rbp. However, in mice lacking this protein, we found that their ability to adapt to the cold and promote thermogenesis—essentially, generating heat through fat—was severely compromised.
Interestingly, we also noted that stimulating human fat cells with retinol heightened the expression of genes associated with thermogenesis and boosted mitochondrial activity, which is vital for burning fat. In humans, the rise in vitamin A during cold exposure hinted at improved fat utilization.
Overall, our findings revealed that not only are vitamin A levels responsive to cold, but effective transportation of this vitamin is crucial for cold-induced fat browning and the body's ability to generate heat.
In our investigation, we conducted cold exposure studies involving both mice and humans. We observed that exposure to cold led to an increase in circulating vitamin A, also known as retinol, and its transporter protein, Rbp. However, in mice lacking this protein, we found that their ability to adapt to the cold and promote thermogenesis—essentially, generating heat through fat—was severely compromised.
Interestingly, we also noted that stimulating human fat cells with retinol heightened the expression of genes associated with thermogenesis and boosted mitochondrial activity, which is vital for burning fat. In humans, the rise in vitamin A during cold exposure hinted at improved fat utilization.
Overall, our findings revealed that not only are vitamin A levels responsive to cold, but effective transportation of this vitamin is crucial for cold-induced fat browning and the body's ability to generate heat.
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.
User Reviews
USERS' SCORE
Good
Based on 7 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
9
Stopped catching colds
I drink these vitamins regularly, and they have raised my immunity. Since I started taking them, I have not had a cold.
9
Less frequent colds
I have been taking cod liver oil for over 20 years and found that I experience fewer colds. I used to get colds 4-6 times annually, but now they have decreased to none or maybe once a year, and if I do catch a cold, it isn’t severe.
7.5
Effective immunity boost
Heading into cold and flu season, I strive to boost my family's immunity, and it’s working well for us.
7.5
Excellent for colds
This product is well-suited for colds and effectively raises immunity. The price and quality are excellent.
7.5
Improved immunity
Since I started taking it, I feel my immune system has improved, and I suffer from fewer colds.
Frequently Asked Questions
7.5
Positive immune boost
Cod liver oil from iHerb has become an essential source of vitamins A, D, and healthy Omega-3 fatty acids for me. I take it daily, and after a month, I’ve noticed positive changes: my skin is more moisturised and radiant, my nails are stronger, and my hair looks healthier. I also noted that the oil positively affects my immune system, particularly during the cold season, as I fall ill much less often. It has a mild taste with a slight fishy note and is easily absorbed without causing discomfort. This product is excellent for maintaining health and beauty from within; I highly recommend it to anyone who cares about their body!
9
Less frequent colds
I have been taking cod liver oil for over 20 years and found that I experience fewer colds. I used to get colds 4-6 times annually, but now they have decreased to none or maybe once a year, and if I do catch a cold, it isn’t severe.
9
Stopped catching colds
I drink these vitamins regularly, and they have raised my immunity. Since I started taking them, I have not had a cold.
7.5
Effective immunity boost
Heading into cold and flu season, I strive to boost my family's immunity, and it’s working well for us.
7.5
Improved immunity
Since I started taking it, I feel my immune system has improved, and I suffer from fewer colds.
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
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
- Fenzl A, Kulterer OC, Spirk K, Mitulović G, Marculescu R, et al. Intact vitamin A transport is critical for cold-mediated adipose tissue browning and thermogenesis. Mol Metab. 2020;42:101088. doi:10.1016/j.molmet.2020.101088
- 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. doi: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. doi: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. doi:10.1007/s12603-017-0952-x
