Necessary Vitamin D intake is 10x higher than currently recommended by the NIH

I am weary of mega dosing vitamin D to 8000 IU as recommended in the article. I am currently taking a bit less than 3000 IU a day and don't plan to increase it unless more research is made.

From the book 'The Perfect Health Diet' :

> 25OHD levels after abundant summer sun exposure, as in lifeguards, peak between 45 and 80 nanograms per milliliter. Outdoor workers in the tropics typically have 25OHD levels between 48 and 80 nanograms per milliliter. These tropical outdoor workers get too much vitamin D.

> People in South India with 25OHD levels of 89 nano-grams per milliliter have a threefold higher rate of heart attack.

> Lifeguards in Israel develop kidney stones twenty times more often than the general population.