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 ...
Vitamins for the Eyes. Vitamins are classified as either fat-soluble or water-soluble. Fat-soluble vitamins are stored in the body and include A, D, E, and K, while the water-soluble vitamins, C and B, are flushed from your body and need to be replaced daily.Taking eye vitamins can help us to maintain the health of our eyes. Vitamin E: Like vitamin C, vitamin E is found in the lens of the eye. 2  It is also a major player in the bodyâs antioxidant defense system. 3  Because it is found in the eyeâs lens, it is believed to help prevent cataracts. 4  Vitamin E is also found in the retina, and is said to help prevent macular degeneration.