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 ...
Top Vitamins for Vision and Eye Health. * Vitamin A is considered by many to be the ultimate eye vitamin and is essential for the retina to function properly. It is also necessary for the production of rhodopsin, which is the visual pigment used in low light levels.