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What Are Your Optimal Vitamin D Levels?

It is helpful to distinguish among Vitamin D deficiency, sufficiency, and an optimal level, although there’s some difference of professional opinion regarding each. FitEyes member Ken Rogers contributed the following information to a recent discussion on our email list. Research research published in the journal article Public Health Nutr. (2014 Apr;17(4):833-43) suggests that vitamin D deficiency should be considered as a potential risk factor for the development of open angle glaucoma. These are the Vitamin D levels several different experts suggest. Notice that the Vitamin D level can be reported in two ways: ng/ml or nmol/l. Translated, ng/ml is ‘nanograms per millileter’ and nmol/l is ‘nanomoles per liter’. Don’t get confused by these differences in units. It's similar to the difference between degrees Fahrenheit and degrees Celsius: you have two different numbers, but only one real temperature. Pick one system and use it. Don't compare one scale to the other without adjusting. The table below uses ng/ml.

Normal Vitamin D Level Recommendations    

  Minimum Optimal (ng/ml) High End of Optimum (ng/ml) Toxic Level (ng/ml)
Bruce Hollis(ng/ml) 32   >250
Vitamin D Council (ng/ml) 50 80  
Vitamin D, A Neglected ‘Analgesic’ for Chronic Musculoskeletal Pain(ng/ml) 30 50 >150
Dr. Mercola (ng/ml) 50 65 >100 (excess)
The Use of Vitamin D in Clinical Practice (ng/ml) 40 70 > 150
Neurologist Stasha Gominak, MD 60 80  
The journal article, Calcium and Vitamin D Diagnostics and Therapeutics states:
It is quite possible that there are two levels of vitamin D sufficiency. One level requires that the serum vitamin D 25 hydroxy levels be at least 20 ng/mL to satisfy the body's requirement for… calcium absorption, bone calcium mobilization and bone mineralization. The second level may need higher circulating levels of vitamin D 25 hydroxy for maximum cellular health...

Prior 'normal' vitamin D 25 hydroxy lab values were 20-56 ng/ml. The authors of the above article suggest the Minimal Optimal vitamin D 25 hydroxy values are now 45-50 ng/ml. Here are a few related articles for further reading:


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