Gentlefolk,
Who should we believe ?
Alex
From Consumerlab.
''Arthur5764 June 10, 2015
,
Check with Vitamin D Council.org - optimal levels of vit d3 have been shown in multiple studies to be over 40 ng/ml. I have been prescribing 2-5k IU vitamin d3 gel caps/day for over 10 years now to 100's of patients. I have only had 1 patient have side effects (high calcium and general malaise) in all this time.
A C Sands MD
Comment on Post
ConsumerLab.com June 10, 2015
Dear Dr. Sands - Studies do not show optimal levels to be over 40 ng/mL, as you suggest. We recommend that you review the information in the section of our Vitamin D Review entitled "Deficiency vs. Insufficiency and How Much Is Too Much?" (https://www.consumerlab.com/reviews//Vitamin_D/#howmuch).
You may not see immediate adverse effects with high levels, but several studies now show higher mortality rates (i.e., more deaths) among people with levels above 40 ng/mL. The range we suggest of 25 to 35 ng/mL should provide the benefits of vitamin D without risk. We also suggest that you check the unbiased and authoritative opinion of the Institute of Medicine of the National Academies, which considers 20 ng/mL adequate for bone and overall health in healthy individuals