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 ...
Boosting vitamin D levels 'could help prevent eyesight from deteriorating'. Boosting vitamin D intake could help prevent deteriorating eyesight and blindness in older people, it is claimed. Scientists said tests revealed taking vitamin D for six weeks could improve vision among middle-aged subjects. Levels of amyloid beta, a toxic protein linked to Alzheimer's disease and known to be a hallmark of ageing, were also reduced in the study.