Never once heard Dr F recommend making sure you have enough Vitamin D.
MOST doctors do NOT recommend any supplements....and, as far as I am concerned are derelict. ALL doctors should do baseline checks on their patients for Vitamin D3 levels...I consider it malpractice if they do not.
I remember him saying he takes 6,000 mg a day.
He let it slip in a fluffy interview with a Hollywood actress that he takes vit D. He hasn’t bothered to share that with us though because it might detract from his effort to vaxjab the whole world.