I have a 23 yr old son that falls in to the "loose screw" category..... but can see a light at the end of the tunnel (even if it's faint at times!!) I DO have two in their mid-late 30s who give me hope for the younger one - and who have made it through some hard times, so I can tell you that it gets better, but the process is certainly trying.
Hope the physical scar reminds her that there are less painful options out there.
And a parent is ALWAYS a parent...........