I would say some of my issue absorbing is gut issues. I have so many food intolerances and allergies as well.

But remember the pharmaceutical industry along with the arm of the government has no interest in keeping us healthy. So making sure we have adequate d levels is not in their interest. Plus there is no money in researching d. So even most drs do not know how much a human should be taking a day. Best way to know is check levels.