system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] What are the limitations of the healing properties of bacta?

As we can see in Episode 5, Luke was treated in bacta for frostbite after his accident on Hoth, but it seems that bacta cannot regenerate lost limbs, since Luke had to resort to a robot hand after Vader's maiming of it.

Could bacta heal degenerative diseases like cancer, autism, autoimmune diseases or any other diseases that usually carries a death sentence?
gpt
Bacta tanks promote cell growth. Think of it as a big container of stem-cells that target damaged cells and repairs them. 


Exposed to a long enough period of time, more delicate cells like brain cells and bone marrow cells might be repaired but bacta isn't cheap. The amount it would take to regrow an arm would be so ridiculously high and that bacta might have been more useful in saving someone's life. 


Getting a robotic replacement is a better alternative and is the affordable option for a vast majority of the Galaxy. Just don't get any back alley augmentations done and you'll be fine.