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 ...
Vitamin A is a group of antioxidant compounds with a long list of benefits for vision, bone development and the growth and repair of body tissue. A deficiency in vitamin A has been shown to cause and exacerbate dry eye disease.itamin A is a group of antioxidant compounds with a long list of benefits for vision, bone development and the growth and repair of body tissue. A deficiency in vitamin A has been shown to cause and exacerbate dry eye disease.