What if instead of posting a link to a blog of a "random person" that summarizes a number of studies, I post the study directly: https://pubmed.ncbi.nlm.nih.gov/30611908/
Title: Daily oral dosing of vitamin D3 using 5000 TO 50,000 international units a day in long-term hospitalized patients: Insights from a seven year experience
> During this time, we have admitted over 4700 patients, the vast majority of whom agreed to supplementation with either 5000 or 10,000 IUs/day. Due to disease concerns, a few agreed to larger amounts, ranging from 20,000 to 50,000 IUs/day. There have been no cases of vitamin D3 induced hypercalcemia or any adverse events attributable to vitamin D3 supplementation in any patient.
> the vast majority of whom agreed to supplementation with either 5000 or 10,000 IUs/day. A few agreed to larger amounts, ranging from 20,000 to 50,000 IUs/day.
This study is mostly about << 20,000 IU/day.
Also, abstract doesn't say precisely how "long-term" they were supplemented for -- was it weeks or years?
Medium term (~1w) loading doses are probably fine given that U.S. president was treated with this for COVID. But we're talking about 20,000 IU/day, every day, for months and years, which is why the study's vagueness about "long-term" matters here.
> Doctors Are Idiots: Vitamin D Megadose. This Is Not Medical Advice, But I'm Correct
> You should be taking somewhere between 10,000-50,000 IU per day of vitamin D3. The optimal dose seems to be about 30,000 IUs as noted by a few people in my research but results will vary.
> Do not sue me if something goes wrong. I am poor and you will get nothing but my manga collection out of the lawsuit.