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Source for the Fauci claim? I've seen a claim of 6000 (not sourced properly), the RDA is 600, I couldn't find even a dubious source for 10000 and all decent sources didn't give a dose at all.

Given that 10000 is considered more than the maximum safe amount by many health authorities, I doubt Fauci would say he's taking that much even if he did.

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The Big Vitamin D Mistake: https://pubmed.ncbi.nlm.nih.gov/28768407/

> A statistical error in the estimation of the recommended dietary allowance (RDA) for vitamin D was recently discovered; in a correct analysis of the data used by the Institute of Medicine, it was found that 8895 IU/d was needed for 97.5% of individuals to achieve values ≥50 nmol/L.

> This could lead to a recommendation of 1000 IU for children <1 year on enriched formula and 1500 IU for breastfed children older than 6 months, 3000 IU for children >1 year of age, and around 8000 IU for young adults and thereafter.

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