system
Given the following post, respond as if you're commenting on Reddit:
human
If the liver can regenerate, how do people die from liver failure?
gpt
Liver failure can happen in two ways. First, the acute damage can simply be too serious for liver cells to deal with before the person dies. Second is a more protracted process, where damages accumulate.

Suppose that the liver has taken damages from infection/drug/alcohol/etc. **Then, instead of liver cells regenerating, scar tissues can form in the liver and replace them.** Scar tissue is tougher than cushy liver tissue, so this leads to hardened liver with reduced function. (Cirrhosis) If this damage keeps piling up, the liver will eventually be overwhelmed and lead to chronic liver failure.