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 ...
Health effects of sunlight exposure - Effects on eyes. 1  Prolonged optical exposure to sunlight, especially intense ultraviolet light, may be linked to cortical cataracts, [32] and high levels of visible light may be linked to macular degeneration.