The treatment for vitamin D deficiency is exposure to sunlight.
There are rules about that in terms of how much of your body is exposed to the sun for how many minutes a day at the given time of a year. And if you go to your local cancer council website or the MyDr website, we’ll have those sorts of rules for you in terms of exposure, so you don’t risk melanoma or skin cancer.
The second way of doing it is by vitamin D supplementation, but not in too high a dose.
Dr Norman Swan, Physician and Journalist