My urinalysis states i have +1 of ketones and +1 of bilirubin. all blood work is normal. furthermore i had gastric bypass surgery about 4 months ago and my labs and urinalysis were normal then. what can this be ?

Since your serum bilirubin & liver enzymes were apparently all normal,I'm unclear what's causing a.mild amount of bilirubin in your urine. It could be a harbinger of liver abnormalities. In this case I would repeat a urinalysis & complete liver panel in a week. A gastroenterologist can advise you further if there's still bilirubinuria. A 1+ reading of ketones in urine is insignificant.

Hydrate yourself and repeat a urinalysis. you could have been dehydrated