Is there a reason to worry for yellow urine and smell? Urine test reports are normal. Sonography normal Colour change is noticed only in the first pee of the morning inspite of not taking any supplements previous night. Slight yellow colour during the day as water is consumed. Never noticed a smell before Only out of range items in blood work: Kidney function: Blood urea nitrogen- 7.7 mg/dl (ref: 7.94-20) Creatinine serum- 0.53 mg/dl (ref 0.55-2.2) Urea calculated- 16.48mg/dl (ref   17-43) Liver function: Billirubin 1.57 mg/dl (ref 0.3 to 1.2)