1 Olson, Christopher R., and Claudio V. Mello. “Significance of Vitamin A to Brain Function, Behavior and Learning.” Molecular nutrition & food research 54.4 (2010): 489–495. PMC. Web. 11 Oct. 2017  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3169332/

Black, Maureen M. “Effects of Vitamin B12 and Folate Deficiency on Brain Development in Children.” Food and nutrition bulletin 29.2 Suppl (2008): S126–S131. Print   https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3137939/

Olson, Christopher R., and Claudio V. Mello. “Significance of Vitamin A to Brain Function, Behavior and Learning.” Molecular nutrition & food research 54.4 (2010): 489–495. PMC. Web. 11 Oct. 2017  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3169332/

4 La Fata, Giorgio, Peter Weber, and M. Hasan Mohajeri. “Effects of Vitamin E on Cognitive Performance during Ageing and in Alzheimer’s Disease.” Nutrients6.12 (2014): 5453–5472. PMC. Web. 11 Oct. 2017  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4276978/