'
Jarrow Formulas Vitamin D3
SCIENTIFIC SCORE
Possibly Effective
Based on 3 Researches
7.3
USERS' SCORE
Good
Based on 1 Review
8.5
Supplement Facts
Serving Size: 1 Softgel
Amount Per Serving
%DV
Vitamin D (as D3 Cholecalciferol)
125 mcg (5,000 IU)
625%

Top Medical Research Studies

8
Vitamin D links to bronchiolitis severity
The Relationship between Bronchiolitis Severity and Vitamin D Status.
Directly addresses vitamin D impact
We explored the connection between vitamin D levels and the severity of acute bronchiolitis in infants, a condition primarily triggered by viral infections in children under the age of two. Our study involved 182 children with bronchiolitis, focusing on assessing disease severity using the Modified Tal Scoring System while also evaluating their serum vitamin D levels.

Our findings revealed that a significant number of infants, about 47.8%, had low vitamin D levels, indicating either deficiency or insufficiency. We observed that infants with lower vitamin D were more likely to experience severe cases of bronchiolitis. Additionally, those who required admission to the intensive care unit had an even higher frequency of vitamin D deficiencies.

This research suggests a strong link between vitamin D deficiency and severe bronchiolitis, emphasizing that checking vitamin D levels prior to the bronchiolitis season and providing adequate supplementation could potentially offer protective benefits for young children against this illness.
Read More
7
Vitamin D may aid bronchitis
Vitamin D and respiratory health in the Busselton Healthy Ageing Study.
Directly addresses vitamin D link
We examined the connection between vitamin D levels and the incidence of bronchitis, among other respiratory conditions, in a large group of adults aged 45 to 69. In our analysis, which included over 5,000 participants, we measured serum levels of 25-hydroxyvitamin D, along with a self-reported history of respiratory issues and lung function through spirometry.

Our findings revealed that individuals with low vitamin D levels, specifically those under 50 nmol/L, showed a higher likelihood of experiencing conditions such as asthma, bronchitis, wheezing, and chest tightness. For instance, those with low vitamin D were about 54% more likely to have bronchitis compared to those with sufficient levels. Interestingly, we also found that participants with vitamin D levels above 100 nmol/L displayed a significant increase in lung capacity when compared to individuals whose levels ranged from 50 to 100 nmol/L.

This suggests that maintaining adequate levels of vitamin D could be beneficial for respiratory health, particularly in reducing the risk of bronchitis and improving lung function. However, it's essential to note that while our study highlights these associations, it did not directly test vitamin D treatment for bronchitis, meaning that further research would be needed to establish a causal link and treatment guidelines.
Read More
7
Vitamin D deficiency worsens bronchiolitis
Vitamin D Levels and Cardiopulmonary Status in Infants with Acute Bronchiolitis.
Moderate impact on health outcomes
We focused on understanding how vitamin D levels relate to heart and lung health in infants suffering from acute bronchiolitis. By observing a group of infants hospitalized for this condition, we classified them according to their vitamin D levels.

Our findings revealed that nearly half of the infants had low vitamin D levels, which correlated with worse cardiac function and increased pulmonary issues. We noted significant differences in respiratory support needs and echocardiographic outcomes between those with low versus normal vitamin D levels.

Specifically, infants with lower vitamin D exhibited more severe symptoms, reflected in higher NT-ProBNP levels—a marker of heart stress—and greater risks of requiring intensive care. With these results, it appears that low vitamin D doesn't just correlate with illness severity, it seems to play a role in worsening respiratory and cardiac function in acute cases of bronchiolitis.
Read More

Most Useful Reviews

8.8
Never ill anymore
I’ve suffered from hay fever since childhood, enduring a month of sneezing each late spring. After experiencing acute bronchitis in January 2017, I realised I couldn't let that happen again. The NP prescribed me strong antibiotics, and while I recovered, I began taking this product soon after. Since then, I haven’t caught a cold or flu and don’t get flu shots. It’s July 2021, and I attribute my good health to this.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 3 Researches
7.3
  • All Researches
8
Vitamin D links to bronchiolitis severity
The Relationship between Bronchiolitis Severity and Vitamin D Status.
Directly addresses vitamin D impact
We explored the connection between vitamin D levels and the severity of acute bronchiolitis in infants, a condition primarily triggered by viral infections in children under the age of two. Our study involved 182 children with bronchiolitis, focusing on assessing disease severity using the Modified Tal Scoring System while also evaluating their serum vitamin D levels.

Our findings revealed that a significant number of infants, about 47.8%, had low vitamin D levels, indicating either deficiency or insufficiency. We observed that infants with lower vitamin D were more likely to experience severe cases of bronchiolitis. Additionally, those who required admission to the intensive care unit had an even higher frequency of vitamin D deficiencies.

This research suggests a strong link between vitamin D deficiency and severe bronchiolitis, emphasizing that checking vitamin D levels prior to the bronchiolitis season and providing adequate supplementation could potentially offer protective benefits for young children against this illness.
Read More
7
Vitamin D deficiency worsens bronchiolitis
Vitamin D Levels and Cardiopulmonary Status in Infants with Acute Bronchiolitis.
Moderate impact on health outcomes
We focused on understanding how vitamin D levels relate to heart and lung health in infants suffering from acute bronchiolitis. By observing a group of infants hospitalized for this condition, we classified them according to their vitamin D levels.

Our findings revealed that nearly half of the infants had low vitamin D levels, which correlated with worse cardiac function and increased pulmonary issues. We noted significant differences in respiratory support needs and echocardiographic outcomes between those with low versus normal vitamin D levels.

Specifically, infants with lower vitamin D exhibited more severe symptoms, reflected in higher NT-ProBNP levels—a marker of heart stress—and greater risks of requiring intensive care. With these results, it appears that low vitamin D doesn't just correlate with illness severity, it seems to play a role in worsening respiratory and cardiac function in acute cases of bronchiolitis.
Read More
7
Vitamin D may aid bronchitis
Vitamin D and respiratory health in the Busselton Healthy Ageing Study.
Directly addresses vitamin D link
We examined the connection between vitamin D levels and the incidence of bronchitis, among other respiratory conditions, in a large group of adults aged 45 to 69. In our analysis, which included over 5,000 participants, we measured serum levels of 25-hydroxyvitamin D, along with a self-reported history of respiratory issues and lung function through spirometry.

Our findings revealed that individuals with low vitamin D levels, specifically those under 50 nmol/L, showed a higher likelihood of experiencing conditions such as asthma, bronchitis, wheezing, and chest tightness. For instance, those with low vitamin D were about 54% more likely to have bronchitis compared to those with sufficient levels. Interestingly, we also found that participants with vitamin D levels above 100 nmol/L displayed a significant increase in lung capacity when compared to individuals whose levels ranged from 50 to 100 nmol/L.

This suggests that maintaining adequate levels of vitamin D could be beneficial for respiratory health, particularly in reducing the risk of bronchitis and improving lung function. However, it's essential to note that while our study highlights these associations, it did not directly test vitamin D treatment for bronchitis, meaning that further research would be needed to establish a causal link and treatment guidelines.
Read More

User Reviews

USERS' SCORE
Good
Based on 1 Review
8.5
  • All Reviews
  • Positive Reviews
  • Negative Reviews
8.8
Never ill anymore
I’ve suffered from hay fever since childhood, enduring a month of sneezing each late spring. After experiencing acute bronchitis in January 2017, I realised I couldn't let that happen again. The NP prescribed me strong antibiotics, and while I recovered, I began taking this product soon after. Since then, I haven’t caught a cold or flu and don’t get flu shots. It’s July 2021, and I attribute my good health to this.
Read More
image