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Vitamin D: Can You Get Enough?
Looking back at 2008, I vote for vitamin D as the biggest nutrition news of the year. We all knew vitamin D was needed for optimal bone formation and maintenance, but I don’t think anyone really appreciated its full importance for our health. From cancer to heart disease prevention to protection against autoimmunity, vitamin D may very well be the most important nutrient to get enough of.
With all the new information on its disease-preventing benefits, many researchers suggest that the Daily Recommended Intake (DRI) for vitamin D should be raised from 400 IUs to a minimum of 1000 IUs. And further studies have found that toxicity is really a non-issue.7 So, no longer are we disputing that the DRI is far too low. Instead, the focus has turned to making sure you are getting enough.
Most of us know that vitamin D is made from cholesterol in the body. Sun exposure is the catalyst that makes this happen. When sun hits the body, cholesterol in the skin is converted to vitamin D. To get enough vitamin D, we are told that we need from 5 to 30 minutes of sun exposure between 10 AM and 3 PM at least twice a week to the face, arms, legs, or back — without sunscreen. But that’s only if you live below the 42° latitude marker. (In the US, that line runs from Northern California to Boston.)
Catch Some Healthy Rays
Have you ever noticed how you feel happier when you have a chance to sit or walk in the warm sun? Doesn’t just going outside on a sunny day calm your nerves and lift your spirits?
By contrast, consider what happens and how you feel during the cold and dreary winter months. Many of us experience darker moods. We are more likely to become sick with colds and flu. We often gain weight and crave carbohydrates.
Then, come spring and summer, these symptoms magically disappear without treatment. Well, there is a reason for this.
Your body needs sunlight just like it needs nutrients. In many ways, your physiology is as closely linked to the sun as that of plants. Plants use sunlight to photosynthesize chlorophyll. By a comparable process your body uses sunlight to photosynthesize vitamin D — a molecule that is vitally essential to almost every aspect of your biochemistry and physiology.
