Health Vitamin D3 & COVID-19: No Impact on Severity, Potential for Long COVID Relief by Dr Natalie Singh - Health Editor March 13, 2026 by Dr Natalie Singh - Health Editor March 13, 2026 Vitamin D and COVID-19: New Research on Severity and Long COVID Risk Recent research indicates that high-dose vitamin D3 supplementation does not reduce the severity of COVID-19 infections, but may … 0 FacebookTwitterPinterestEmail