There have been a number of discoveries against the point the point that the human neurons have this ability of renewing themselves in the later ages of life. Another way of keeping your mental health is by the intake of healthy foods. Ayurveda is a holistic healing science which in fact is knowledge or science of life. While these approaches are definitely effective, they are other more native ways you can help keep your mental health stable. I have previously written on the side effects of anti-depressants and how despite their many benefits they can produce https://www.myptsd.com/understanding-post-traumatic-stress-disorder-ptsd/76/ some very unwelcomeside effects.
But again, re-read the above paragraphs before taking them as "the truth. If you will be physically healthy, I am sure you can be almost perfect in having a mental health. I hope it has been of some use.