Vitamin D and vitamin K are frequently paired in supplements due to potential synergistic effects, though taking them together may not always be necessary.

In a large, randomized trial, researchers at Mass General Brigham found that high-dose vitamin D3 did not reduce COVID-19 ...

A major clinical trial has delivered an unexpected twist in the search for ways to fight COVID-19 and its lingering effects. Researchers at Mass General Brigham found that taking high doses of vitamin ...

New study reveals vitamin D supplements may reduce long COVID risk by 4%. Promising results for symptoms like fatigue and ...

Could vitamin D influence what happens after COVID recovery? Emerging evidence hints it may not reduce severity—but could ...

A randomized trial found that high-dose vitamin D3 did not reduce COVID-19 severity, healthcare visits, or infection rates among household contacts. However, participants who adhered to supplements ...

I am confused about vitamin D. I have been taking it for years, along with calcium, to protect my bones. Recently, I read that there is no evidence it works and that too much could be harmful. Can you ...

High-dose Vitamin D doesn't reduce acute COVID severity but shows a promising signal for reducing Long COVID and brain fog.

In a large, randomized trial, researchers at Mass General Brigham have found that high-dose vitamin D3 did not reduce COVID-19 infection severity, but may impact long COVID outcomes.

Mass General Brigham study results signal a call to do further research into the connection between vitamin D supplementation and long COVID.In a large, randomized trial, researchers at ...

Vitamin D didn’t blunt COVID’s initial impact—but it may hold a surprising clue in the fight against long COVID.