Iron is the most abundant element on Earth, yet iron deficiency is the most common nutritional disorder both in the United States and the world, according to the World Health Organization.
As the days get shorter, we tend to spend more time indoors. Festive though they are, candles, holiday lights, and fireplaces can’t make up for the sunlight we lack this time of year. And the sun’s cheerful light and warmth aren’t the only things we miss through the winter: our bodies need sunlight to help produce vitamin D.
Vitamin D has been getting a lot of attention lately for several reasons. It appears that vitamin D deficiency may affect many more people than previously thought who reside at mid-northern latitudes, including most of the United States. This is true even at the current recommended daily intake of 400 International Units (IU). The National Institutes of Health will likely recommend an increase to 800 – 1000 IU per day in May 2010, when they release their review of the vitamin D guidelines.