Give me a D, Vitamin D

This blog was originally intended to cover science and technology, but it has grown to cover other topics related to this area. I have been writing several posts on nutrition and health since it is of interest to everyone. This post will be about a very important vitamin, Vitamin D. What differentiates this vitamin from the rest is the main source is not from our diets, but from sunlight exposure. It turns out the wavelength range in sunlight that produces Vitamin D in our skin, UVB radiation at 295-300 nm, is the same radiation that causes skin cancer. This supports the statement, "moderation in all things." As for dietary sources, the only concentrated natural vitamin D sources are seafood based. It appears in much lower doses within egg yolks. Vitamin D is routinely added to the US milk supply to prevent the deficiency in Americans which was first observed in the 1920's as the disease rickets in the general population. Rickets mostly vanished in the US after the fortification program started.

What inspired me to discuss this topic is evidence exists that Vitamin D deficiency may lead to chronic fatigue or even potentially Chronic Fatigue Syndrome. What I have noticed in the last few days is feeling tired with no real purpose. My diet was good. I exercised regularly. My sleep was high quality with about 7 hours on the weekdays and 8+ on the weekends. Why do I feel sluggish all of the time? Thinking about it, this is how I always feel since living in Texas from mid-January to mid-March. Going further back, it is the same sensation that I felt in the gloomy Oregon winter with no sunshine. Fast forward to the present, we have had lots of cloudy days and little sunshine in the last few weeks. Due to my indoor work environment, when it was sunny I did not get any sunlight exposure outdoors. That is when it hit me, I might have Vitamin D deficiency. To battle this affliction, I am taking a multivitamin (400 IU dose), eating tuna fish sandwiches at lunch and taking 10 minute walks in the sun at around noon when possible. The regiment might also have some Vitamin D supplements added. I will update my rehabilitation progress after about a week.