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Originally Posted by Jessica Adlin  Yes, excellent indicator! Just a note, if you have just taken a multiple vitamin, your urine may be a brighter yellow even if you are adequately hydrated. Riboflavin (B2) excreted in the urine produces this color - fun facts! |
Another note - if you have been on the beer then this will also make your urine colourless, however you will actually be dehydrating yourself! When I drink, I follow the pint for a pint rule - I drink a pint of water for every pint of beer. This keeps those nasty hangovers at bay.