Studies show that a Month after a megadose of 60,000IU blood levels revert to base level, - so it does, in fact, change significantly over a few days. Furtherm

Studies show that a Month after a megadose of 60,000IU blood levels revert to base level, - so it does, in fact, change significantly over a few days. Furthermore, it’s possibly the body uses more for some processes when in distress, which would complicate reasoning.