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 ...
4. Sight Problems. Vitamin E deficiency may also lead to vision problems. One of the symptoms is retinal thinning or degeneration, where the inner lining of the eye is damaged and begins to become thinner. People with an vitamin E deficiency may also experience blurred vision and difficulty seeing at night.