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Vitamin K2 and D3 for long COVID

The use of combined vitamin K2 (MK-7) and vitamin D3 for treating long COVID symptoms and biological markers.

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Jan 17, 2026
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Which randomized trials have tested vitamin K2/D3 for long COVID and what were their outcomes?

A single randomized controlled trial published in Nutrients is, to date, the only randomized study that specifically tested combined vitamin K2 (MK‑7) and vitamin D3 for established long COVID and rep...