Story perspectives

High-Dose Vitamin D May Reduce Long COVID Risk

3/18/2026

Summary

Story summary

High-dose vitamin D may lower the risk of long COVID, according to the Vitamin D for COVID-19 (VIVID) trial published in The Journal of Nutrition.
The VIVID trial enrolled over 1,700 participants and found that 21% of those taking vitamin D had lingering symptoms at eight weeks, compared with 25% in the placebo group.
The trial did not reduce the severity of acute COVID-19 infections.
Larger trials are needed to confirm these findings and clarify vitamin D's immune-regulation role.

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Story summary

High-dose vitamin D may lower the risk of long COVID, according to the Vitamin D for COVID-19 (VIVID) trial published in The Journal of Nutrition.
The VIVID trial enrolled over 1,700 participants and found that 21% of those taking vitamin D had lingering symptoms at eight weeks, compared with 25% in the placebo group.
The trial did not reduce the severity of acute COVID-19 infections.
Larger trials are needed to confirm these findings and clarify vitamin D's immune-regulation role.