# Yellow Urine
**URL:** https://boards.straightdope.com/t/yellow-urine/155840
**Category:** Factual Questions
**Created:** [February 18, 2003, 7:57am UTC](https://boards.straightdope.com/t/yellow-urine/155840 "2003-02-18T07:57:04Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@psjs](https://boards.straightdope.com/u/psjs)
#### Post date: [February 18, 2003, 7:57am UTC](https://boards.straightdope.com/t/yellow-urine/155840/1 "2003-02-18T07:57:04Z")
:smack: why do you pass bright yellow-coloured urine when you take a B-Complex tablet?
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### Author:  [@antechinus](https://boards.straightdope.com/u/antechinus)
#### Post date: [February 18, 2003, 9:14am UTC](https://boards.straightdope.com/t/yellow-urine/155840/2 "2003-02-18T09:14:03Z")
It is probably just excess riboflavin (B2) being excreted or a metabolite of riboflavin.
B2 is a bright orange substance that is sensitive to light - you wrap solutions of it up in alfoil during analysis.
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### Author:  [@Rattman](https://boards.straightdope.com/u/Rattman)
#### Post date: [February 18, 2003, 12:53pm UTC](https://boards.straightdope.com/t/yellow-urine/155840/3 "2003-02-18T12:53:48Z")
yellow shows you are not drinking enough liquid, because the poisions are still there,
but with the mix of that drug it may be getting rid extra poisions
that’s my 2p
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### Author:  [@pingalondon](https://boards.straightdope.com/u/pingalondon)
#### Post date: [February 18, 2003, 1:09pm UTC](https://boards.straightdope.com/t/yellow-urine/155840/4 "2003-02-18T13:09:24Z")
And they put loads of colouring in those things so that they look appetising fizzing away in the glass.
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### Author:  [@Kalashnikov](https://boards.straightdope.com/u/Kalashnikov)
#### Post date: [February 18, 2003, 1:30pm UTC](https://boards.straightdope.com/t/yellow-urine/155840/5 "2003-02-18T13:30:41Z")
Vitamin C does the same thing - makes your urine bright, almost day-glo yellow.
Sorry Rattman, it has nothing to do with “poisons”. It will happen even the urine is fairly dilute and its an entirely different color.
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### Author:  [@antechinus](https://boards.straightdope.com/u/antechinus)
#### Post date: [February 19, 2003, 12:05am UTC](https://boards.straightdope.com/t/yellow-urine/155840/6 "2003-02-19T00:05:45Z")
It isnt poisons, Ratman.
Riboflavin is a food colouring, pingalondon.
Ascorbic acid is colourless, Kalashnikov.
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### Author:  [@Fuel](https://boards.straightdope.com/u/Fuel)
#### Post date: [February 19, 2003, 1:37am UTC](https://boards.straightdope.com/t/yellow-urine/155840/7 "2003-02-19T01:37:28Z")
It’s very unhealthyto take those vitmains with excessive B’s in them. I was taking GNC with 3000% of one B vitmain and others too and right when i satrting taking them, my arms started falling a sleep the second i layed dow nto go to bed. I got off them and it hasn’t bothered me since. Be careful.
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### Author:  [@psjs](https://boards.straightdope.com/u/psjs)
#### Post date: [February 19, 2003, 8:06am UTC](https://boards.straightdope.com/t/yellow-urine/155840/8 "2003-02-19T08:06:43Z")
Thanks folks! I’ll take care.