# florecent urine
**URL:** https://boards.straightdope.com/t/florecent-urine/159452
**Category:** Factual Questions
**Created:** [March 6, 2003, 7:40am UTC](https://boards.straightdope.com/t/florecent-urine/159452 "2003-03-06T07:40:33Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@King\_Friday](https://boards.straightdope.com/u/King_Friday)
#### Post date: [March 6, 2003, 7:40am UTC](https://boards.straightdope.com/t/florecent-urine/159452/1 "2003-03-06T07:40:33Z")
I’ve noticed that when I take 2 multi-vitamins instead of one, along with 2 calcium pills, I have bright yellow piss that night. One multi and 2 calcium equals normal piss. However, today I took 1 multi, 2 calcium and 1 garlic pill and I’m back to the bright stuff. Is this unhealthy?
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### Author:  [@Vaioman](https://boards.straightdope.com/u/Vaioman)
#### Post date: [March 6, 2003, 7:42am UTC](https://boards.straightdope.com/t/florecent-urine/159452/2 "2003-03-06T07:42:53Z")
I think it’s just your body getting rid of the excess vitamins…
don’t quote me though.
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### Author:  [@Desmostylus](https://boards.straightdope.com/u/Desmostylus)
#### Post date: [March 6, 2003, 8:13am UTC](https://boards.straightdope.com/t/florecent-urine/159452/3 "2003-03-06T08:13:18Z")
[Riboflavin (Vitamin B-2)](http://micro.magnet.fsu.edu/vitamins/pages/riboflavin.html)
> [@](#):
>
> Riboflavin is a water-soluble vitamin that was named from the Latin word flavius (yellow) to denote the deep color of crystals formed from the pure vitamin and the deep yellow color it gives to urine.
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### Author:  [@lite](https://boards.straightdope.com/u/lite)
#### Post date: [March 6, 2003, 8:25am UTC](https://boards.straightdope.com/t/florecent-urine/159452/4 "2003-03-06T08:25:53Z")
Most vitamins are excreted if there is too much. The only time to worry is if urine color is odd all the time. But watch out, there are some vitamins that can be toxic if you take too much.
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### Author:  [@ChalkPit](https://boards.straightdope.com/u/ChalkPit)
#### Post date: [March 6, 2003, 9:19am UTC](https://boards.straightdope.com/t/florecent-urine/159452/5 "2003-03-06T09:19:47Z")
As for being truly flourescent, I remember hearing that urine is flourescent under Ultra Violet light. No idea why though.
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### Author:  [@El\_Zagna](https://boards.straightdope.com/u/El_Zagna)
#### Post date: [March 6, 2003, 1:58pm UTC](https://boards.straightdope.com/t/florecent-urine/159452/6 "2003-03-06T13:58:04Z")
Yes it is. As a landlord and dog owner I have often used black lights to identify pet accidents. I assume human urine would glow also, but my tenents tend to be above pissing on the carpet.