Liver can be harmed either by infection or injury, but the organ can quickly go back to normal even if the affected parts (up to three quarter's of the organ) are removed.

Doctors depend heavily on this special aspect of the liver to help save patients suffering from fatty liver disease, hepatitis B & C, and cirrhosis.

Liver's regeneration capacity is impaired by liber disease. Doctors inject growth factors such as granulocyte-colony stimulating factor to stimulate regeneration.