Dr. Myers had a video on this in 2010.
Is High Dose Vitamin D Dangerous?
Posted October 13, 2010/askdrmyers.wordpress.com/page/26/
A couple of recollections - do not take your vitamin D with morning oatmeal or it will have no effect. So I take my D-3, K-2 and calcium at night.
It's not the amount of IU's of vitamin D-3 taken, but rather the actual serum D levels as each guy absorbs it differently.
It's more likely a high level of calcium taken with D-3 and K-2 will cause problems for you than the D itself.
I suspect what Tall Allen says about
the U--shaped curve is true that too much of anything is dangerous, but too little serum D is not good either.
I used to take a lot of D-3 (10,000 IU even though I live in the sunshine state) which seems to mitigate the fatigue associated with Lupron and I have my serum D tested regularly.
Despite this high intake my serum D is in the middle of range
Date Reference 11-14 07-14 05-14 01-14 10-13
serum D [30-100] 70 53 50.5 46.4 43.5
So when it trended up to 70 in November I cut back to 5000 IU and had it tested this morning to calibrate next dosage.
I had to print out the article to peruse it later as I find it tedious to read on a computer screen, but I too had the question of quantifying what is meant by high levels of serum D.
My thoughts are the range of serum D [30-100] was set at that level for a reason to avoid either end of the U-shaped curve.
66 - DX 64 2/13 PSA 3.68 (6 mo doubling) Gleason 9 (4+5)
T1CN0M1B stage IV w. 7 of 12 cores worst ones 70% right PNI
oligometastatic at Dx 5 tumors 1 right sacro, 2 on
T4 & T9, none visible on 5-21-14 whole bodyscan
1st Lupron 4 month 3-28-13,
PSA down was 3.68, Zytiga June 2014
PSA < 0.01, T < 6 on 10/14,
Prostate shrunk from 50.4 to 15.0
Provenge in Sept & SBRT Radiation in Oct