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 ...
Print |. A A. To prevent the slow degradation of the eyes, it is essential to consume certain nutritional and dietary supplements for eye health. Ten of the best supplements for eye health are: 1  Vitamin A: Vitamin A is required in large doses to ensure proper functioning of the retina, especially at night. 2  Deficiency of vitamin A may cause ocular disorders like Xeropthalmia or night blindness. 3  Vitamin A also plays a vital role in preventing dryness in the eyes.