Earlier quoted context omitted.
Yes, dosage should be 10k IU / day for starters with 5mg vitamin K2. Fat-soluble so take with a meal. Vitamin D depletes Vitamin A and magnesium, get the former from foods and supplement the latter as magnesium glycinate and/or chloride. Other common & relevant deficiencies are boron and zinc, especially zinc.
10k IU/day exceeds the Tolerable Upper Intake as determined by the US's National Academy of Medicine, the European Food Safety Authority, and similar organizations. Medical doctor Deva Boone posted a report of toxicity at half that dose: https://www.devaboone.com/post/vitamin-d-part-2-shannon-s-st... This post and related posts about vitamin D were discussed on HN. See: https://news.ycombinator.com/from?site=devaboon…
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541280/#:~:tex....
Doctors correcting vitamin D levels are finding 10k IU is a good starter dose and that is often insufficient to arrive at optimal levels.