1. Skipping breakfast or no breakfast at all.
If you do not take your breakfast you are going to have a lower blood sugar level which leads to an insufficient supply of nutrients to the brain causing brain degeneration.
2. Over Eating.
If you over eat, it will cause hardening of your brains arteries, leading to decrease in mental power.
Not only does it harm your lungs however also your brain. The nicotine ingredient in cigarettes also contain some substances that cause multiple brain shrinkage and may even result in a Alzheimer’s disease.