How does the liver help remove wastes from the blood?

The liver plays a vital role in maintaining blood health by acting as a primary organ for detoxification and the removal of metabolic waste products. It processes these substances to prepare them for elimination from the body through the urine or feces.12

Key mechanisms by which the liver removes waste include:

• Nitrogenous Waste Processing: The liver disposes of toxic ammonia—a byproduct of amino acid degradation—by converting it into urea through the urea cycle. This urea is then transported by the blood to the kidneys for excretion.32
• Bilirubin Excretion: As the liver destroys old red blood cells, it produces bilirubin, a pigment derived from hemoglobin. The liver conjugates this pigment and excretes it into the bile, which travels to the gastrointestinal tract to be eliminated.142
• Detoxification: The liver filters the blood to remove or modify various toxic substances and drugs, rendering them safe for excretion.12
• Cellular Cleanup: Specialized cells called Kupffer cells line the liver's vascular system and ingest foreign particles and cellular debris.2