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 ...
Alternatively, vitamin A eye drops in the form of beta-carotene have been exceptionally effective for the treatment of mild to moderate dry eyes. A 2008 study found lubricating eye drops that contained Vitamin A improved symptoms of blurred vision and tear film abnormalities after just four weeks of use.h, vitamin A. Cancer fighter, bacteria killer and wrinkle inhibitor. This all important nutrient is well known for its undeniable ability to defend against viruses and enhance immunity. Thus, it should come as no surprise that vitamin A can also help relieve aqueous-deficient and evaporative dry eye symptoms.