Why is liver transplantation considered for patients with severe liver failure?

Liver transplantation is considered for patients with severe liver failure primarily to replace the diseased liver with a healthy one. In cases of liver failure, the liver can no longer perform its vital functions, such as detoxifying harmful substances, synthesizing proteins, and producing essential biochemicals for digestion. A healthy liver from a donor can restore these functions, significantly improving the patient's quality of life and potentially saving their life.

The other options do not accurately represent the main purpose of liver transplantation. While dietary changes may be necessary for patients with liver disease, the transplantation itself is not a method to avoid those changes; rather, it aims to resolve the underlying liver dysfunction. Accelerating liver regeneration is not a direct outcome of transplantation; instead, transplantation provides a new organ that can function properly. Lastly, while viral infections may affect liver health, transplantation does not directly treat the infection but rather addresses the damage caused by it, allowing for the restoration of liver function.