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 ...
Brighten Skin. Topical vitamin C serums can brighten age spots and hyper-pigmentation, or discoloration of the skin. The vitamin C serums act as a natural bleaching agent and lighten the skin, including age spots and dark circles under the eye.