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 ...
Vitamin A Deficiency. Although not extremely common in the United States, a deficiency of vitamin A in the diet can have a significant effect on the body; vitamin A deficiency is associated with xerophthalmia, or dry eyes, and is also characterized by an increase in night blindness and can even lead to overall blindness.