Metric system. Metric system, international decimal system of weights and measures, based on the metre for length and the kilogram for mass, that was adopted in France in 1795 and is now used officially in almost all countries.
However, if taken in large doses, vitamin D side effects may include: Thirst; Metallic taste in the mouth; Increased urination; Decreased appetite; Weight loss; Constipation; Vomiting; Diarrhea; Itchy skin; Loss of muscle tone; Irritability; Tiredness; Sore eyes; Pain in the bones and joints ...
That's an eye disease where, basically, you get old and the part of the eye responsible for your sharpest vision changes so your vision isn't as sharp. Research has shown that, once this disease has started, taking certain vitamin supplements (Occuvite, Vitalux, there's a couple brands) can slow down its progression.