I had vitamin d deficiency and they prescribed a 50,000 IU pill to take once a week for 3 months, then said 5000 IU daily after that would be fine.
What qualified as deficient also changed during this time too. The recommendation doesn’t surprise me and the vitamin stuff has always seemed like they didn’t really know what they were talking about imo.
In India the standard of care used to be (unsure if its still the case) of a bolus dose of 60,000 IU once a week, for a month, after which you switch to taking the 60,000 IU once a month.
What qualified as deficient also changed during this time too. The recommendation doesn’t surprise me and the vitamin stuff has always seemed like they didn’t really know what they were talking about imo.