Can’t find any numbers on dosage. every time I get my blood checked the VitD concentration is reported. There is a range. A few years ago my doc told me to take a pill to knock it back into the high end of “normal”. Is that sufficient?
I believe many people who take vitamin d take too much and that the optimum blood level is 32 ng/ml. There are more kidney stones among people who have a level of 50 ng/ml. Excess vitamin d reduces vitamins k, c, gamma tocopherol and other vitamins.
At least 5000 IU a day should be sufficient.