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 ...
Here are my list of top vitamins for eyes. Vitamin A is considered to be vital for ongoing vision health. It improves weak eyesight by influencing the formation of rhodopsin, a pigmented compound in the rods of the retina. Vitamin A helps you see better in dim light and maintain the integrity of membranes that keep the cornea moistened.