Treatment - "Rebuild" your brain?

[boyTwist]

Hi, I am looking for info about rebuilding the brain after stress or drug abuse.
I am new to this forum, and an ex "head", I recently came through some stress, and was left with depression. In an effort to see if my old drug use/abuse had affected my brain I searched the internet.
It seems stress, alcohol, nicotine, etc. can impact the brain's chemistry.
This affects Serotonin levels, for which Doctors may prescribe Serotonin reuptake inhibitors. However, I have discovered there may possibly be other ways to deal with this, in fact, there seems to be some evidence to suggest that the burned out cells can reproduce, particularly in the hippocampus.
Simple things like proper nutrition and taking Lecithin. (found in eggs) can seemingly help improve your chances of regrowing your burned out brain cells.
I am very keen to learn more about this, and would welcome any input from anyone who can provide links or information that might help.
(I am an amateur, not a qualified medical researcher) It is important that we ensure studies are verifiable, not myth, rumour or hearsay. THANKS!