>>12855779if you want to reliable see an increase, you have to supplement +10k iu daily. you can even megadose initially as in short term there are no drawbacks to going as high as 50k daily.
As long as your vitamin K levels are optimal, you should have no reason to worry in regards to toxicity, but do check calcium levels along with d levels in 3 months or so. As long as calcium is at bay, you won't be at risk for atherosclerosis.