6000? I thought the safe level was 4000 IU?
The gist of the lecture I saw last week stated that "safe" D3 intake amounts vary widely from individual to individual. What you are really looking for is the blood serum level of Vitamin D. The only real way of knowing if you are taking enough is to have your blood tested. They also said not to have your blood tested until 6 weeks after you begin taking D3.
After being diagnosed with the following: MS, ALS, Chemical immunodeficiency, arthritis,, I had a doc run a simple Vit-D test. My Vitamin D level was almost non-existent. For the next 3 months I took a 20,000 IU tablet once a week, and took 4000 IU Vit-d3 tabs daily. Within three months, all my symptoms had almost vanished.
So, in my case, 4000IU’s was the daily dose. I still take 2000IU daily. It’s amazing what this particular chemical controls in the body.