7. Stress
And finally, chronic stress can have a negative effect all over the body. Situational stress is actually a good thing that prepares the body to fight or flee in the face of danger, but when your lifestyle includes chronic stress, the hormone cortisol builds up in the brain and causes lasting damage.
Not only can it kill brain cells, it actually causes the brain to shrink. When this shrinking effect hits the prefrontal cortex, your ability to learn and remember becomes impacted. It is imperative that you find a way to relax before it’s too late.