By undergoing a liver transplantation, but donor livers are very hard to come by, and afterwards one needs lifelong immune suppressive meds lowering one’s defenses against infections, and raising the risk of developing cancer.

Liver replacement devices aren’t yet routinely available, the experimental MARS is only available in top end intensive care units, not sure how efficacious they are seen nowadays, at best it’s a bridge until a donor liver becomes available, see University of Maryland School of Medicine