Hey Mouse, interesting reading. i am always concerned, and confused, with the amounts to take. I am still taking my D3 as well, 5,000 daily. I am always wondering just how much is ok to take? For a couple months, when first started taking it, I felt so good, an improvement in my over all feelings, happier, etc. Then that feeling began to wan, I felt I should maybe double it for a while to 10,000, but can't get a straight answer from my dr. and while all my other blood work came back, he doesn't feel its necessary to test for the d level, noted that my calcium, mag, and pots. levels were excellent. I just wonder if I should take the 10,000 units, or if thats too much.Guess, will just have to keep bugging my dr. about the test. It was great to see that your levels have gone up!