'
Nature's Way Vitamin A
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
USERS' SCORE
Good
Based on 1 Review
8.4
Supplement Facts
Serving Size:  1 Softgel
Amount Per Serving
%DV
Vitamin A (from fish [liver] oil, retinyl palmitate)
3,000 mcg
333%

Top Medical Research Studies

7
Vitamin A supports immune response
Effect of oral vitamin A supplementation on host immune response to infectious bronchitis virus infection in specific pathogen-free chicken.
Focus on viral immune response
We conducted a study to investigate how vitamin A supplementation affects the immune response in chickens infected with the infectious bronchitis virus (IBV). In our approach, we used 40 one-day-old specific pathogen-free (SPF) chickens, dividing them into two groups. One group received an oral vitamin A treatment daily, while the other group was given a placebo until they were 21 days old.

Afterward, both groups were infected with a pathogenic strain of IBV. Our findings showed that while vitamin A supplementation didn't significantly alter the disease's clinical course or the chickens' overall growth, it had some notable effects on their immune response. Specifically, we observed increased levels of IBV-specific antibodies and a decrease in viral load in certain tissues among the vitamin A group.

Interestingly, vitamin A appeared to also suppress some immune responses, leading to lower expression levels of certain molecules related to inflammation and immune regulation. While vitamin A helped improve specific aspects of the immune response, it did not completely cure the chickens or prevent infection.

Overall, we can conclude that while vitamin A supplementation can offer some benefits in terms of boosting immunity and managing viral replication, it doesn't drastically change the outcome of IBV infections in chickens.
Read More

Most Useful Reviews

7.5
Reduces coughing
Very good! I take it to support my lungs during illness, alleviating coughing and aiding faster recovery from bronchitis. I also crush the capsule and apply it to my face and body as a cream to replenish deficiencies. It works excellently on wounds on my lips.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
  • All Researches
7
Vitamin A supports immune response
Effect of oral vitamin A supplementation on host immune response to infectious bronchitis virus infection in specific pathogen-free chicken.
Focus on viral immune response
We conducted a study to investigate how vitamin A supplementation affects the immune response in chickens infected with the infectious bronchitis virus (IBV). In our approach, we used 40 one-day-old specific pathogen-free (SPF) chickens, dividing them into two groups. One group received an oral vitamin A treatment daily, while the other group was given a placebo until they were 21 days old.

Afterward, both groups were infected with a pathogenic strain of IBV. Our findings showed that while vitamin A supplementation didn't significantly alter the disease's clinical course or the chickens' overall growth, it had some notable effects on their immune response. Specifically, we observed increased levels of IBV-specific antibodies and a decrease in viral load in certain tissues among the vitamin A group.

Interestingly, vitamin A appeared to also suppress some immune responses, leading to lower expression levels of certain molecules related to inflammation and immune regulation. While vitamin A helped improve specific aspects of the immune response, it did not completely cure the chickens or prevent infection.

Overall, we can conclude that while vitamin A supplementation can offer some benefits in terms of boosting immunity and managing viral replication, it doesn't drastically change the outcome of IBV infections in chickens.
Read More

User Reviews

USERS' SCORE
Good
Based on 1 Review
8.4
  • All Reviews
  • Positive Reviews
  • Negative Reviews
7.5
Reduces coughing
Very good! I take it to support my lungs during illness, alleviating coughing and aiding faster recovery from bronchitis. I also crush the capsule and apply it to my face and body as a cream to replenish deficiencies. It works excellently on wounds on my lips.
image