29 Oct '16, 3pm

As the daylight hours shrink away you may want to consider a vitamin D supplement. #running

As the daylight hours shrink away you may want to consider a vitamin D supplement. #running

One colleague to whom I lamented about my chronic fatigue asked me if I had checked my Vitamin D levels. “Vitamin D levels?” I exclaimed. I live in California, it is summer, and I am outside way more than the recommended 20 to 30 minutes a day. There is no way I could be Vitamin D deficient, especially since in addition to being exposed to sun most days, I eat a very balanced diet that includes a daily multivitamin supplement. However, a visit to my doctor confirmed that my serum 25–hydroxy-Vitamin D (25(OH)D) value was dangerously low (18 ng/ml). Normal levels are between 40-70 ng/ml. And for those with chronic diseases such as cancer, heart disease, diabetes, and multiple sclerosis, normal blood levels should be between 55-70 ng/ml. I was shocked.

Full article: http://running.competitor.com/2014/03/nutrition/vitamin-d...

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