1. No Breakfast - People who do not take breakfast are going to have a lower blood sugar level. This leads to an insufficient supply of nutrients to the brain causing brain degeneration.      

      
2. Over-eating - It causes hardening of the brain arteries, leading to a decrease in mental power.

                            
3. Smoking - It causes multiple brain shrinkage and may lead to Alzheimer disease. 

4. High Sugar Consumption - Too much sugar will interrupt the absorption of proteins and nutrients causing malnutrition and may interfere with brain development.                               

5. Air Pollution - The brain is the largest oxygen consumer in our body. Inhaling polluted air decreases the supply of oxygen to the brain, bringing about a decrease in brain efficiency.

6. Sleep Deprivation - Sleep allows our brain to rest. Long term deprivation from sleep will accelerate the death of brain cells.

                                     
7. Head covered while sleeping – Sleeping with the head covered increases the concentration of carbon dioxide and decrease concentration of oxygen that may lead to brain damaging effects.

8. Working your brain during illness-Working hard or studying with sickness may lead to a decrease in effectiveness of the brain as well as damage the brain.

9. Lacking in stimulating thoughts-Thinking is the best way to train our brain, lacking in brain stimulation thoughts may cause brain shrinkage.

       
10. Talking Rarely–Intellectual conversations will promote the efficiency of the brain.