that’s a *large* effect. randomized Vitamin D3 treatment protective against severe Covid disease https://twitter.com/DavidDavisMP/status/1360647462197878791 …pic.twitter.com/S998v6NiPi
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yes, IIUC it's what ingested Vitamin D supplements turn into, over many days, in the body. so a megadose of calcifediol upon symptoms achieves levels that would have required large Vit D ingestion over previous 1-2 weeks. …
studies which try basic OTC D3 (cholecalciferol) in people who've already tested-positive/shown-symptoms are, due to this delay, missing the window-of-opportunity that earlier prophylactic supplementation, or direct calcifediol adminsitration, can hit. …
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