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 ...
However vitamin A and C are important for overall eye health and this also implies to floaters and flashes in the eyes. Eat foods and fruits that are rich in these vitamins. For example carrots, oranges, green leafy vegetables, apples, strawberry, lime, kiwi fruit etc.