1. It's the first visible sign of the "Bilirubin Backup."
1. It's the first visible sign of the "Bilirubin Backup."
Your liver processes bilirubin — a waste compound from normal red blood cell breakdown. When your liver is healthy, it clears it fast and your urine stays pale straw. When it's sluggish, bilirubin backs up into your kidneys. That dark yellow color every morning is your liver showing you it's overwhelmed.