But sure fats is more dangerous than others, and probably the most dangerous type is fat that surrounds the organs in your stomach. Normal urine is evident or a lightweight shade of yellow. A few meals can change it to a unique shade, but most of the time your urine shouldn’t differ a lot. What you’re actually in search of is a sudden darkening. Dark yellow urine, or urine that looks blood-tinged, can signal dehydration or a urinary tract an infection .