I take 5000 i.u. /day. My last blood test showed my D3 level was 52ng/ml exactly where it should be.
My last blood test showed my D3 level was 52ng/ml exactly where it should be.
That’s higher than it should be. The ideal level is 32 ng/ml. There are more people with kidney stones among those with a level of 50 ng/ml than 32 ng/ml.