In addition to the skin damage, sitting in front of the computer, in a long time will make us a lack of vitamin D may be known to all, the role of vitamin D is very important to our health. Vitamin D deficiency is because most of our time in the day to come into contact with the computer and other activities will not have a lot of outside to absorb sunlight. It makes our bones more fragile or dangerous diseases, cancer and some other dangerous bone diseases
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