What is an optimal vitamin D level?
This is a question I am often asked and the following may help answer it.
There is still differing opinions as to optimum levels of vitamin D with some studies suggesting sufficient vitamin D levels are above 20 ng/ml (50 nmol/l).
However, other experts claim that blood levels above 30 ng/ml (75 nmol/l) are the optimal level.
The Endocrine Society, recommends aiming for blood levels that are closer to 30 ng/ml (75 nmol/l) and, the research I have examined agrees with their recommendation that around 75 nmol/l may be the optimal level of 25-hydroxyvitamin D (vitamin D), particularly with reference to immune function, bone and muscle heath.
Before taking any supplements or medications always read the label and follow your healthcare practitioners advice.
1. Setright R, Vitamin D3, the Super Nutrient: An Independent Review of Complementary Medicine Evidence. JATMS, 1 June 2011
2. J Clin Endocrinol Metab. 2011 Dec;96(12):3908
3. Heike A Bischoff-Ferrari et al. Am J Clin Nutr. 2006 Jul.
4. Michael F Holick et al. Am J Clin Nutr. 2008 Apr.
5. Michael F Holick. N Engl J Med. 2007.