Forbes, Scott C, Jayna M. Holroyd-Leduc, Marc J. Poulin, and David B. Hogan. “Effect of Nutrients, Dietary Supplements and Vitamins on Cognition: A Systematic Review and Meta-Analysis of Randomized Controlled Trials”. Canadian Geriatrics Journal 18, no. 4 (October 16, 2015): 231–245. Accessed May 16, 2022. https://cgjonline.ca/index.php/cgj/article/view/189.