https://www.devaboone.com/post/vitamin-d-part-2-shannon-s-st...
which would appear to contradict this article quite directly, if I'm reading correctly (I'm a know-nothing here taking 2000 iu /day, just trying to understand the topic)?
"Her Vitamin D was low at the time, so her physician started her on over-the-counter Vitamin D supplementation at 5000 international units (IUs) daily. Five years later, she was still on this dose, and her blood Vitamin D level had risen to 79 ng/ml. This level is within what many labs call the normal range, between 30 and 100 ng/ml, but levels above 70 are almost always a result of high dose supplementation, and I have seen toxicity with levels between 70 and 100 ng/ml. (A better “normal range” based on what I have seen would probably be between 30 and 60.) "
The linked article seems to be using nmol/L units as opposed to ng/ml so multiplying by 2.5 doesnt seem to be working out for me, someone who knows something have any comparison between these two?