Avocados
Avocados contain unsaturated fats that help develop a healthy brain, and they help decrease blood pressure. High blood pressure contributes to cognitive impairment, so consumption of avocados helps to increase cognitive ability. Sources of unsaturated fats that help enhance brain function include; fish, walnut and brazil nuts, [7] almonds, cashews, peanuts, and chia seeds.
Conclusion
All these foods have recommended daily intake; therefore, Excess consumption of any of these foods has side effects on the brain. Nutritionists always advise sticking to the daily allowances of these foods. [8]
Reference:
[1] http://www.webmd.com/
[2] http://www.hsph.harvard.edu/
[3] http://www.webmd.com/
[4] http://www.mayoclinic.org/
[5] http://www.medicalnewstoday.com/
[6] http://www.medlineplus.gov/
[7] http://www.medicalnewstoday.com/
[8] http://www.healthline.com/