Why so high? Our doc said 1,000 - 2,000. I had read recently that it could help fatigue so I started taking 10,000 - 12,000, until I read yesterday about irregular heartbeats and a bunch of other things. So, I thought maybe I better cut back! lol
I had been taking 4,000 IU's a day for about 18 months. My most recent blood tests show that my vitamin D was still way low...so, 50,000, we'll see.