Meta analysis using the most serious outcome reported shows 30% [5‑48%] lower risk.
Control Vitamin B12
No treatment is 100% effective. Protocols combine safe and effective options with individual risk/benefit analysis and monitoring. Other treatments are more effective. Vitamin B12 currently has no early treatment studies.
There is very limited data to date, with only one RCT, 2 treatment studies, and 2 prophylaxis studies. All data and sources to reproduce this analysis are in the appendix.
Covid Analysis et al., May 2025, preprint, 1 author.
