The latest neuroscience research show that we can indeed grow new brain cells (Neuroplasticity).
The best way to generate new Hippocampal neurons is to exercise.
Stress reduction and Meditation, have been shown to substantially expand the volume of Hippocampus – Dr.Majid Fotuhi – Neurologist, Harvard Medical School.
Please read further here:
http://www.neurogrow.com/uploads/5/6/3/4/56349771/blog_-_grow_new_brain_cells.pdf