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Vitamin D Levels

To get an idea of what “normal” is, let’s look at populations living near the equator where we all evolved from. At or near the equator, the average person has vitamin D levels around 50 ng/mL. Here are the generally accepted graduated levels of vitamin D deficiency:

Extreme deficiency: 20 ng/mL (high risk of various conditions)
Clinically deficient: below 32 ng/mL (increased risk of various conditions)
Borderline deficient: below 35 ng/mL
Acceptable: 35-45 ng/mL
Healthy: 45-55 ng/mL, or
Optimal: 55 ng/mL
Excess: greater than 100 ng/mL
Intoxication: greater than 150 ng/mL

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