Question:
What does it mean when the urine is bright yellow?

I'm 6 months post-op and down 80pds, but when I urinate it's really bright yellow. I drink a lot of water I don't burn when I go. I'm hoping it's fat that's coming out of my body. Wishful thinking I bet any suggestions.    — Antoinette P. (posted on May 29, 2001)

May 29, 2001
It's probably from your vitamins. Vitamin B2, riboflavin, can cause this.
   — [Deactivated Member]

May 29, 2001
Its more than likely your vitamins... have your Dr check. A lot of times people are getting to much of them and you may be able to cut back if you are trully over doing it.
   — Dawn R.

May 29, 2001
Yelp. It's the vitamins!
   — Danmark

May 29, 2001
It may be the vitamins but my nutritionist also advised me of dehydration and the urine will be a dark yellow. Sometimes we may think we're drinking enough when we're not. Couldn't hurt to keep track of fluids to be sure and follow up with Dr.(phone call works for me). Check with the pharmacist on the vitamins. It could be that but then again maybe not....best wishes
   — Linda M.

May 29, 2001
One way to check if it's the vitamins is to look at the color in the morning and in the afternoon. It should be bright yellow soon after you take your vitamins, but if you are getting lots of fluids in, the yellowness should be very slight in the afternoon. I've been taking vitamins daily for three years following a spleenectomy and I've definitely noticed this trend.
   — PT LawMom

July 5, 2001
I had the same and the dietitian said it was from dehydration.
   — Diane C.

October 16, 2002
I am a RN and the bright yellow is from the vitamins that you are hopefully taking. Now, if you are dehydrated your urine will look like a very dark yellow and of course urine output will not be that great with dehydration.
   — train

August 8, 2003
you are probably going through keytosis.
   — Jaredsfa2004

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