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The typical daily amounts of vitamin D we absorb from food and supplements can be counted in the hundreds of international units (IU) while the amounts we absorb from sunlight can be counted in the thousands of IU.
 

Quick Guide to Vitamin D

The health issue

The most common misunderstanding about vitamin D deficiency is that it is not a health issue. In fact in United States the CDC reported 32% of all children and adults are at risk for vitamin D deficiency. Studies in Australia reported that at least 40% of children and adults are at risk for vitamin D deficiency.

What is Vitamin D

Are pregnant women at increased risk?

Pregnant women are at high risk for vitamin D deficiency. Our study reported that women who took a prenatal vitamin and drank 2 glasses of milk a day thus taking 600 IUs of vitamin D daily that 76% of them were vitamin D deficient at that time they gave birth and 81% of their newborns were also vitamin D deficient.