I have this problem also. When I went to the Dr. to get a couple tests run...they did a urine sample. The nurse showed the Dr. my urine because she was shocked how yellow it was. They said they were running a bunch of tests because they thought there was something else wrong. Anyway, when I got my test results in the mail, they included a note. It said, "Urine has strange color because body is in Ketosis...from Atkins diet." So, I think you're ok, it's probably just a sign of ketosis for you too!

HTH
~Amy