Over 8 to 12 weeks, their vitamin D status had been restored to normal by means of oral vitamin D replacement therapy. (ahealthblog.com)
If you are not getting regular sun exposure on large amounts of your skin you may need anywhere from 5 to 20,000 units of oral vitamin D3 per day. (articles.mercola.com)
Why risk it when the safer and just as effective option of oral vitamin K exists. (thehealthyhomeeconomist.com)