Last update
3/14/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Very Likely Ineffective
Based on 1 Research
1
USERS' SCORE
Good
Based on 3 Reviews
8.4
Supplement Facts
Serving Size: 1 drop (0.028 ml or 0.001 fl oz)
Amount Per Serving
%DV
Top Medical Research Studies
1
We investigated whether high-dose vitamin D supplements could lessen flu symptoms in preschool kids during winter. In a study with 703 healthy children aged 1 to 5 in Toronto, we randomly assigned them to either high-dose (2000 IU/day) or standard-dose (400 IU/day) vitamin D.
Unfortunately, our findings revealed that high doses did not lead to any improvement in flu symptom severity, nor did it reduce doctor visits, emergency room trips, or antibiotic prescriptions. Overall, it appears that sticking to the standard recommended dose is advisable for managing flu symptoms in children.
Unfortunately, our findings revealed that high doses did not lead to any improvement in flu symptom severity, nor did it reduce doctor visits, emergency room trips, or antibiotic prescriptions. Overall, it appears that sticking to the standard recommended dose is advisable for managing flu symptoms in children.
Read More
Most Useful Reviews
9
Enhances overall health
Fantastic! Vitamin D is essential for babies to grow healthily! When I run out, I immediately reorder from iHerb! The benefits are evident: my baby is less likely to fall ill and copes better with colds during flu season. The product's quality is exceptional, and the taste is pleasant; my baby takes it without fuss.
Read More
7.5
Supports immune health
2 people found this helpful
Is this suitable for my child? Vitamin D3 influences the immune system's activity. Adequate vitamin D3 intake can reduce the incidence of acute respiratory infections and flu. With fewer sunny days during colder weather, it's important to obtain this sunlight vitamin from food and supplements. This product contains D3 (cholecalciferol), though the source isn't specified; however, its NSF certificate assures quality. Children aged 4-8 should take 600 IU (15 μg) per drop. Consult a doctor before giving it to younger children. Each bottle has 100 drops. It’s advisable to take one drop in the morning to boost the child's activity. Store it upright in a cool, dark place.
Read More
7.5
Prevents flu
Hello, this Vitamin D is excellent; there's no need to hesitate in taking it, as the drops are always convenient. I would certainly recommend it for adults too. It's enjoyable to take them. I truly believe that this vitamin D helps to prevent flu during the winter months.
Read More
Medical Researches
SCIENTIFIC SCORE
Very Likely Ineffective
Based on 1 Research
1
- All Researches
1
We investigated whether high-dose vitamin D supplements could lessen flu symptoms in preschool kids during winter. In a study with 703 healthy children aged 1 to 5 in Toronto, we randomly assigned them to either high-dose (2000 IU/day) or standard-dose (400 IU/day) vitamin D.
Unfortunately, our findings revealed that high doses did not lead to any improvement in flu symptom severity, nor did it reduce doctor visits, emergency room trips, or antibiotic prescriptions. Overall, it appears that sticking to the standard recommended dose is advisable for managing flu symptoms in children.
Unfortunately, our findings revealed that high doses did not lead to any improvement in flu symptom severity, nor did it reduce doctor visits, emergency room trips, or antibiotic prescriptions. Overall, it appears that sticking to the standard recommended dose is advisable for managing flu symptoms in children.
Read More
User Reviews
USERS' SCORE
Good
Based on 3 Reviews
8.4
- All Reviews
- Positive Reviews
- Negative Reviews
9
Enhances overall health
Fantastic! Vitamin D is essential for babies to grow healthily! When I run out, I immediately reorder from iHerb! The benefits are evident: my baby is less likely to fall ill and copes better with colds during flu season. The product's quality is exceptional, and the taste is pleasant; my baby takes it without fuss.
Read More
7.5
Supports immune health
2 people found this helpful
Is this suitable for my child? Vitamin D3 influences the immune system's activity. Adequate vitamin D3 intake can reduce the incidence of acute respiratory infections and flu. With fewer sunny days during colder weather, it's important to obtain this sunlight vitamin from food and supplements. This product contains D3 (cholecalciferol), though the source isn't specified; however, its NSF certificate assures quality. Children aged 4-8 should take 600 IU (15 μg) per drop. Consult a doctor before giving it to younger children. Each bottle has 100 drops. It’s advisable to take one drop in the morning to boost the child's activity. Store it upright in a cool, dark place.
Read More
7.5
Prevents flu
Hello, this Vitamin D is excellent; there's no need to hesitate in taking it, as the drops are always convenient. I would certainly recommend it for adults too. It's enjoyable to take them. I truly believe that this vitamin D helps to prevent flu during the winter months.
Read More
Frequently Asked Questions
9
Enhances overall health
Fantastic! Vitamin D is essential for babies to grow healthily! When I run out, I immediately reorder from iHerb! The benefits are evident: my baby is less likely to fall ill and copes better with colds during flu season. The product's quality is exceptional, and the taste is pleasant; my baby takes it without fuss.
7.5
Supports immune health
2 people found this helpful
Is this suitable for my child? Vitamin D3 influences the immune system's activity. Adequate vitamin D3 intake can reduce the incidence of acute respiratory infections and flu. With fewer sunny days during colder weather, it's important to obtain this sunlight vitamin from food and supplements. This product contains D3 (cholecalciferol), though the source isn't specified; however, its NSF certificate assures quality. Children aged 4-8 should take 600 IU (15 μg) per drop. Consult a doctor before giving it to younger children. Each bottle has 100 drops. It’s advisable to take one drop in the morning to boost the child's activity. Store it upright in a cool, dark place.
7.5
Prevents flu
Hello, this Vitamin D is excellent; there's no need to hesitate in taking it, as the drops are always convenient. I would certainly recommend it for adults too. It's enjoyable to take them. I truly believe that this vitamin D helps to prevent flu during the winter months.
References
- Hueniken K, Aglipay M, Birken CS, Parkin PC, Loeb MB, et al. Effect of High-Dose Vitamin D Supplementation on Upper Respiratory Tract Infection Symptom Severity in Healthy Children. Pediatr Infect Dis J. 2019;38:564. 10.1097/INF.0000000000002225
Data last updated:
