Vitamin D3and Immune response.
Evidence gradeA
ImpactModerate
Confidencehigh
Imported rating. This grade comes from SuppCo and has not been independently reviewed. It describes research, not a product, and it is not medical advice.
The rating
- Direction
- Favourable
- Rated by
- SuppCo
- Observed
- 28 September 2026
Studies behind it
Vitamin D supplementation in critically ill patients: a meta-analysisWen-He ZhengEffects of a 2-Week 5000 IU versus 1000 IU Vitamin D3 Supplementation on Recovery of Symptoms in Patients with Mild to Moderate Covid-19: A Randomized Clinical TrialS. Sabico · Nutrients2021Randomized trial of vitamin D supplementation to prevent seasonal influenza A in schoolchildrenMitsuyoshi Urashima