system
Given the following post, respond as if you're commenting on Reddit:
human
[DC/Marvel] If an old person were to suddenly gain the power of Regeneration, would their body become young again?

Would it also heal any mental illness?
gpt
There's different kinds of regeneration in fiction. In some cases, the body simply has a base state that it tries to return itself to, which might allow someone to remain a certain age, but there's also regeneration that's simply extremely accelerated healing. So, maybe, depending on the canon/source of regeneration.