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Lack of Vitamin A causes night blindness. Vitamin-A rich food stuffs like carrots much be taken in frequently to get rid of that disease .
http://wiki.answers.com/Q/What_vitamin_causes_the_...
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Vitamin A.
http://wiki.answers.com/Q/What_vitamin_helps_preve...
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I don't think it matters. However, some people can get an upset stomach and have better luck taking them before bed. Sometimes, even when taken with food in the morning, they can
http://wiki.answers.com/Q/When_should_you_take_vit...
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Loss of vision, particularly night vision, is a symptom of vitamin A deficiency.
http://wiki.answers.com/Q/What_vitamin_deficiency_...
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