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 ...
Supplements, vitamins, and nutrients that support good eyesight. The lens, retina, macula, and other parts of the eye can be protected with the proper intake of antioxidants. Many antioxidants have a positive influence on eye health including vitamin C, vitamin E, carnosine and alpha lipoic acid.