Up to 4,000 IU is generally recognized as safe. If you take a multivitamin, there is some in that that you should subtract. https://www.health.harvard.edu/stay

Up to 4,000 IU is generally recognized as safe. If you take a multivitamin, there is some in that that you should subtract. https://www.health.harvard.edu/staying-healthy/how-much-vitamin-d-do-you-need https://www.health.harvard.edu/staying-healthy/how-much-vita...