Comment by seba_dos1

It may not be that crazy in fact, unless it's prolonged. Don't take 30k/day for several months without supervision, but doing that for a single month is unlikely to harm you if you start from deficiency. Some people may need even more than that.

In any case, keep your blood levels in check. It's cheap and easy. There are even services you can order to have your blood sample taken at your home.