08 Apr '20 18:43>
@metal-brain said“If you have a significant deficiency, the recommended approach currently is to use 50,000 IU of vitamin D once a week for six to eight weeks, then remeasure levels, to try to boost those values back up a little more quickly,” LaSalle said.
"it will take weeks, perhaps months to get your vitamin d levels back to optimal levels."
What is your source of information?
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.courant.com/prime/hc-fea-prime-vitamin-d-1205-story.html&ved=2ahUKEwjfksjUvNnoAhVRgK0KHflJCVUQFjADegQIDBAK&usg=AOvVaw0QE-FARSBd1zS4AsspN1Dl
That was from a Google search, here is another
For this reason, it's recommended to take vitamin D supplements with a meal to enhance absorption. According to one study in 17 people, taking vitamin D with the largest meal of the day increased vitamin D blood levels by about 50% after just 2–3 months ( 7 ).
Anytime you use supplements the general rule is to wait 3 months to see results.