I, too, was advised to take a larger dose of Vitamin D because my levels were low. 4000 was recommended. Started with 1000 twice a day. Didn't seem to agree with me on a few levels. Dropped down to 1000....still too much. Will now look for 400 ... I know it's available, just haven't looked yet. 400 is what's generally in multi-vitamins and that level didn't seem to cause the difficulties I experienced taking larger amounts.
A little sunshine in Florida, probably 10 minutes or so, is helpful for synthesis of the vitamin in our bodies. In addition, the sunshine is good for one's spirit....
