Urine pigmentation: Dark urine may be simple concentration from dehydration or more concerning like hemolysis from strenuous exercise. Drink moe water and get checked out.
Answered 1/23/2015
6k views
Taking vitamins?: If you mean by yellower, darker then it could be d/t dehydration as my colleague indicated. But if you mean brighter yellow it could be d/t vitamin water or any other vitamin intake used pre competition.
Answered 3/28/2015
6k views
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